->''"Yep, that's me!"''
-->-- '''Raven''', ''Series/ThatsSoRaven''

Essentially, this is when the theme tune of a particular show is written, sung or both by a member of the cast or someone else involved in the show in an otherwise non-musical context. Distinct from ThemeTuneCameo in that the theme may or may not actually appear in the show in an "in-universe" context, but in the real world it is written/sung by the real person.

See also ImageSong.
----
!!Examples

[[foldercontrol]]

[[folder: Anime and Manga]]
Because the networks and studios notice that pop music and youth-centered stories are "in", this happens a lot in anime to the point where some companies won't hire voice actors unless they can sing as well.

* ''MagicalGirlLyricalNanoha'' has a tradition of having the opening theme sung by Fate's voice actor (Creator/NanaMizuki), and the ending theme by Nanoha's (Creator/YukariTamura).
** NanaMizuki does this a lot, with examples including ''Anime/BloodC'' (endings), ''Anime/DogDays'' (openings), ''Manga/RosarioToVampire'' and ''Anime/SenkiZesshouSymphogear'' (openings), to name a few.
*** The ''Anime/DogDays'' endings are sung by Creator/YuiHorie, and the ''Anime/SenkiZesshouSymphogear'' are sung by Creator/AyahiTakagaki. In the latter series, if something else is played instead of the usual ending theme, it's an ImageSong of a character.
* ''Manga/MahouSenseiNegima'': The original, the AlternateContinuity and the LiveActionAdaptation have the thirty-one girls of Negi's class singing the theme song. The first two switch what groups of girls are singing every so often, saving the whole class for the final episode, but the third uses the whole class to begin with. This doesn't stop them from including a version sung by the lead set of TrueCompanions -- Asuna, Konoka and Setsuna. Only on the EndingTheme single, though.
* Roughly 83% of any anime that feature Music/MegumiHayashibara.
* In fact, a lot of {{Anime Theme Song}}s fall under this trope.
* ''Anime/CodeGeass'' deserves a special mention here, though, because for one episode[[spoiler: after killing his father]], the EndingTheme is a DarkReprise sung by the voice actor of Lelouch, instead of a separate and seemingly disconnected group. Not even the last episode either; one episode later, the normal ending for this half is back as if nothing ever happened.
* Repeatedly by Creator/AyaHirano, best known as the voices of Haruhi and Konata from ''[[LightNovel/HaruhiSuzumiya The Melancholy of Haruhi Suzumiya]]'' and ''Anime/LuckyStar'', respectively. She performed both the OP and ED for Haruhi (and ''as'' Haruhi), and along with the other members of the main cast, did the OP to Lucky Star too.
** Also played with within the universe itself with Mikuru being made to sing the theme song for the StylisticSuck SOS brigade movie, "The Adventures of Mikuru Asahina."
** For the "Second Coming" of ''Haruhi'' although, she sings the new ending "Tomare" as Haruhi, but she sings the new intro "Super Driver" in her own voice.
* RicaMatsumoto has done several opening themes for ''Anime/{{Pokemon}}'', where she does the voice of Satoshi (Ash). This includes three songs for the original series, two for ''Advanced Generation'', a duet with Creator/MegumiToyoguchi (Dawn's seiyuu) for ''Diamond & Pearl'', and both ''Best Wishes!'' openings.
** This is a trend started almost immediately with the show, as she is the singer for the first opening theme.
** And several ending themes for ''Anime/{{Pokemon}}'' are sung by members of the cast. Seiyuus for Ash, Misty, Brock, May, Professor Oak, and Team Rocket have at least contributed one ending to the LongRunner series.
** Not to mention Rica both playing Bikky in the Manga/{{FAKE}} OAV as well as singing the ending theme "Starlight Heaven."
* The ending theme of ''Anime/GatchamanCrowds'' is sung by Maaya Uchida, who voices the protagonist Hajime.
* The ''Manga/SayonaraZetsubouSensei'' theme song are sung by "Zetsubou Shoujo-tachi" - a group made up of the lead female voice actors of the show, often with each singing one line solo.
* The ending song of ''Shinkyoku Soukai Polyphonica Crimson S'' is sung by Haruka Tomatsu, the voice actress for Corti.
* Majority of the songs in ''Anime/FullMoonOSagashite'' are sung by Music/{{Myco}} of Changin' My Life, especially the ending themes.
* ''Anime/SailorMoon's'' second (third if you want to get technical as the singers of the first changed in the third season) deserves special mention. Its lyrics were written by the Mangaka. The Second version suberts this, as it is sung by the actresses of the Inner Senshi, but not their voice actresses in the show; their actresses in the stage musicals.
** In a couple dubs (including the Dutch and the Swedish), Sailor Moon's voice actress even sang the intro theme.
** The third ending theme is performed by the five voice actresses of the inner senshi.
* The voice actors for the Keroro Platoon from ''Manga/KeroroGunsou'' have done a number of the show's opening and closing themes, including a version of the first opening as performed by the Keroro Platoon.
* VicMignogna, VA of the main character Dark, sang an English cover of ''Manga/DNAngel's'' theme song.
** Subverted with the ending theme of ''Manga/OuranHighSchoolHostClub''. While he wrote the English translation, he wasn't allowed to sing it because his character, Tamaki, doesn't sing. There is still a version of him singing it [[http://www.youtube.com/watch?v=jbuuaC1yWQA here]].
* Sean Schemmel, the voice of Goku, sung the opening theme in the first ''Anime/DragonBallKai'' DVD.
** Every DVD released since has used a different member of the cast.
* The OP and ED themes of ''Anime/WeissKreuz'' are sang by [[Creator/TakehitoKoyasu the]] [[Creator/ShinichiroMiki four]] [[Creator/TomokazuSeki leads']] [[Creator/HiroYuki seiyuus.]]
* ''Anime/{{Dancougar}}'' has a version of its ending Burning Love sung by the Juusenki Tai. Fairly awesome.
* the opening themes for the ''Manga/HidamariSketch'' anime are sung by the main four (later six) characters' (Yuno, Miyako, Sae and Hiro, later Nori and Nazuna) voice actresses.
* In ''LightNovel/KoreWaZombieDesuKa'', Creator/IoriNomizu (Haruna) sings the opening theme for both seasons, while Rie Yamaguchi (Taeko Hiramatsu, a girl from Ayumu's class who frequently talks with him) sings the ending themes for both seasons.
* ''Anime/MacrossFrontier'''s 2nd OP, "Lion", sang by Creator/MegumiNakajima (Ranka Lee) and [[Music/MayNakabayashi May'n]] (Sheryl Nome).
** The first OP Trianguler was sung by Creator/MaayaSakamoto who played [[spoiler:Ranka's Mother Ranshe]].
* Creator/AiMaeda performed all but one of the eight ending themes for ''Anime/DigimonAdventure'' through ''Anime/DigimonFrontier'', as well the ending themes to some of the films; she portrayed Mimi Tachikawa in ''Adventure'' and ''Anime/DigimonAdventure02'', but didn't have any roles in ''Anime/DigimonTamers'' or ''Frontier''.
* ''Ro-Kyu-Bu!'' is sung by the five main characters who so happen to have actually formed a group by the same name.
* In the anime version of ''[[Anime/TheIdolmaster THE iDOLM@STER]]'', Kotori sings one of the ending themes.
** The song Yakusoku also fits, as the ending of episode 20, since, even though the girls are {{Idol Singer}}s they are ''not'' song writers.
** Really, the entire show counts for this, because the characters in-universe sing the songs that are used for all the episodes' openings, endings, and insert songs.
* Creator/MaayaSakamoto did this for her debut in ''Anime/TheVisionOfEscaflowne''.
** And has been doing so in about half of the anime where she has a character since.
* Music/MegumiHayashibara does most if not all the opening and ending themes for ''LightNovel/{{Slayers}}'', either solo or with another singer.
** She also does the opening for ''LightNovel/{{Slayers}}''' sister franchise Anime/LostUniverse
** The ending theme to the final episode of the third season, "Somewhere in the World," is sung by HoukoKuwashima, Filia's voice actress.
* ''LightNovel/InfiniteStratos'' has the ending theme sung by the female main characters, with various versions as more characters are introduced. Check the EvolvingCredits page for details.
* In a possible inversion of this trope, T.M.Revolution, who did the first opening themes for ''Anime/MobileSuitGundamSEED'' and ''Anime/MobileSuitGundamSEEDDestiny'', was given a small role in the first series and a slightly larger and more plot significant role in the second. The singer for one of the ending themes was offered a similar opportunity but turned it down which is why Shiho Hahenfluss never has any lines in the anime.
* ''Anime/OkusamaWaMahouShoujo'' ending is sung by Creator/KikukoInoue, who's the voice for the slightly-older-than-standard MagicalGirl Ureshiko.
* Most people do not know that the theme song to ''Happy Kappy'' is actually preformed by Suguri and Kappy themeselves!
* In ''Anime/PuellaMagiMadokaMagica'', the two ending themes "See You Tomorrow" and "And I'm Home" are sung by Madoka's voice actress and Sayaka's and Kyouko's voice actresses, respectively.
** Only on the DVD; in the original anime, those episodes either ran the credits over their final scenes or just used the standard credits.
* HalkoMomoi performs both the voice acting for Mii and the opening theme in ''Anime/{{Popotan}}''.
* ''Manga/{{Working}}'' is interesting in the sense that not only the female leads[[note]]Creator/KanaAsumi, SakiFujita, Creator/EriKitamura[[/note]] get to sing a theme song (the opening), but the male leads[[note]]Creator/JunFukuyama, Creator/DaisukeOno, Creator/HiroshiKamiya[[/note]] too (the ending). This format is repeated in its second season as well.
* ''Manga/NoMatterHowILookAtItItsYouGuysFaultImNotPopular'': The ending theme used for most episodes is "No Matter How I Look At It, It's Not My Fault" performed by the actress doing the voice of Tomoko.
* The anime of ''LightNovel/KamisamaNoInaiNichiyoubi'' has the opening performed by Dee's voice actress, Creator/EriKitamura, while the ending theme is done by Creator/MikakoKomatsu, Ulla's voice actress.
* HarukaTomatsu, Erii Yamazaki, and M.A.O. sing "Dating Time", the ending theme for ''Anime/SamuraiFlamenco''.
* ''Manga/SakuraTrick'' has very nearly the entire cast sing the opening theme, and the two leads sing the ending theme.
* ''Manga/TonariNoSekiKun'' has an unusual take on this- one of the characters is actually seen [[BreakingTheFourthWall ''making'' the opening]] (drawing, animating, recording), which is entirely in character for him.
* In ''Manga/ACertainScientificRailgun'', Creator/YoshinoNanjo (who plays Maaya Awatsuki) is the vocalist of fripSide, who sings all of the shows opening themes like "only my railgun", "[=LEVEL5=]-judgelight-", "future gazer", "sister's noise", and "eternal reality". Creator/YukaIguchi (who plays Index) sings the ending themes "Grow Slowly" and "Stand Still".
* All themes of ''Manga/MinamiKe'' are sung by the {{Seiyuu}}s of the Minami sisters: Creator/RinaSato, Creator/MarinaInoue and Creator/MinoriChihara.
* Four songs from ''Manga/TheWorldGodOnlyKnows'' fall under this trope:
** The ending song of the first season's final episode, ''[[http://www.youtube.com/watch?v=9saxcHj6im8 The Dream Traveler of the Integrated Circuit]]'', doubles as StylisticSuck since it's primarily sung off-key by an exhausted [[Creator/HiroShimono Keima.]]
** There's also the opening for the ''Goddesses Arc'', ''[[http://www.youtube.com/watch?v=rNC-i5-Z6LU God Only Knows -Secrets of the Goddess-]]'', featuring [[Creator/SaoriHayami Haqua]] on vocals.
** Coupled with EvolvingCredits, the ending theme ''Kizuna no Yukue'' is sung by the girl who is revealed to be having one of the Goddess (except for [[spoiler: Tenri]] which is already revealed on the ''[[spoiler:Tenri-hen OVA]]'') in that episode (except for Episodes 1,7 and 8 which have no ending themes and Episode 9 which has a different ending theme altogether)
*** Episode 2: [[spoiler:[[Creator/NaoTouyama Kanon Nakagawa]]]]
*** Episode 3: [[spoiler:[[Creator/KaoriNazuka Tenri Ayukawa]]]]
*** Episode 4: [[spoiler:[[Creator/YukaIguchi Tsukiyo Kujou]]]]
*** Episode 5: [[spoiler:[[Creator/AyahiTakagaki Yui Goido]]]]
*** Episode 6: [[spoiler:[[Creator/KanaHanazawa Shiori Shiomiya]]]]
*** Episode 9: [[spoiler:[[Creator/AyanaTaketatsu Ayumi Takahara]]]]
*** Episode 11: All of the girls above.
** Then, doubling as LyricalDissonance, there's ''[[http://www.youtube.com/watch?v=3alvOcc4LKw The Memory of My First Love]]'',primarily sung by [[Creator/KanaAsumi Chihiro]] as lead vocalist of the ''2B Pencils'' (First as ending theme for the ''4 People and an Idol'' OVA, then accompanied by [[Creator/NaoTouyama Kanon]] on backing vocals in the ''Goddesses Arc'' final episode).
[[/folder]]

[[folder:Film]]
* Creator/TomHanks and Creator/DanAykroyd performed a ThemeTuneRap "City of Crime" for the 1987 TheFilmOfTheSeries of ''Franchise/{{Dragnet}}''. They also did a music video, which [[http://www.youtube.com/watch?v=pT_QRKfv8H4 must be seen to be believed]].
** It's really HilariousInHindsight considering the saga of Chet Haze, Hanks' white rapper son.
* Creator/JohnCarradine, who played a brief role in ''Film/RedZoneCuba'', also sang the theme tune. His singing voice makes it absolutely clear that he should have perhaps cut back on the smoking.
** Also, his son David Carradine wrote and performed the theme tune to the film ''Sonny Boy''.
* Creator/JohnCarpenter composes the scores for many of his films (and also, as part of the Coupe de Villes, sang the end title song to ''Film/BigTroubleInLittleChina'').
* Anita Mui was not only a famous actress in Hong Kong, but also a pop star in the early 1980s. Because of this, she ended up performing the theme for ''Film/HeroicTrio''.
* Besides starring in, writing, directing and producing his movies, Creator/CharlieChaplin wrote their music.
* Director Creator/MikeFiggis often composes his own scores for his films.
* BryanSinger regular John Ottman not only directed ''Film/UrbanLegendsFinalCut'', but also did the composing and editing (by trade, he is in fact a composer but also edits Singer's films).
* Creator/SylvesterStallone sang the theme song ("Too Close to Paradise") for his quickly forgotten ''Rocky'' follow-up ''Paradise Alley'', the only movie ever to feature songs performed by Sly, Frank Stallone and ''Music/TomWaits''!
* This doesn't quite count since it wasn't actually included in the movie, but Creator/ClintEastwood recorded and released a version of [[http://www.youtube.com/watch?v=4ui-7Rjc-N8 "Burning Bridges"]] from ''Kelly's Heroes''.
** Eastwood subsequently wrote themes for his films as a director (such as ''Film/{{Unforgiven}}'') and then graduated to scoring them - apparently the likes of Lalo Schifrin, JohnWilliams, Jerry Fielding and Maurice Jarre were just a warmup. He has written (and at times, sung) [[http://www.imdb.com/name/nm0000142/#soundtrack songs]] or [[http://www.imdb.com/name/nm0000142/#composer full-on scores]] for his movies.
* The title theme of ''Film/{{Spider Baby|OrTheMaddestStoryEverTold}}'' is sung (well, [[LargeHam hammily]] recited) by its star, Lon Chaney Jr.
* In ''WesternAnimation/IceAge: Continental Drift'', Keke Palmer's song "We Are" is played over the credits, with the main cast singing along (Keke Palmer voices Peaches, by the way).
* Though it isn't listed in the credits, "Lullaby" from ''Film/RosemarysBaby'' (the music that plays over the opening credits) is sung by Mia Farrow herself.
* Clint Mansell's score for ''Abandon'' features vocals from the film's star KatieHolmes.
* Similarly, Sara Paxton's voice is worked into David Hirschfelder's score for ''Film/{{Aquamarine}}'' (Paxton and Creator/EmmaRoberts also have songs on the soundtrack).
* TonariNoSekiKun has an interesting example of this for both the opening and ending, in that Seki is shown literally [[BreakingTheFourthWall making the opening (recording, animation, etc) and playing the music for the ending.]]

[[/folder]]

[[folder: Live Action TV]]
* An in-show example for ''Series/BrooklynNineNine'', Peralta is on a case with Captain Holt and wants them to play characters, he's Bret Barley, a cop who hates violence against animals, and Holt is Gerald Jimes, a man who can solve every crime except one-the murder of his wife. Holt dismisses the idea, of course, but it doesn't stop Peralta from singing a song about the two fake detectives.
** "Look out bad guys, its Barley and Jimes, Barley and Jimes are on the case!"
* Two Franchise/SuperSentai series: ''Series/ChoujuuSentaiLiveman'' and ''Series/KousokuSentaiTurboranger''. Both have their theme songs sang by the actors of their respective Red Rangers.
** The EndingTheme of ''Series/HikoninSentaiAkibaranger'', "Ashita wa Akiba no Kaze ga Fuku", is sang by Nobuo's actor Masato Wada.
* ''Franchise/KamenRider''. Going all the way back to [[Series/KamenRider the original]], several series have featured songs performed by members of the cast, usually TheHero or TheLancer. An incomplete listing: ''[[Series/KamenRiderV3 V3]]'', ''[[Series/KamenRiderSuper1 Super-1]]'', ''[[Series/KamenRiderBLACK BLACK]]'', ''[[Series/KamenRiderRyuki Ryuki]]'', ''[[Series/KamenRiderBlade Blade]]'', ''[[Series/KamenRiderKabuto Kabuto]]'', ''[[Series/KamenRiderDenO Den-O]]'', ''[[Series/KamenRiderKiva Kiva]]'', ''[[Series/KamenRiderDecade Decade]]'', ''[[Series/KamenRiderDouble Double]]'', and ''[[Series/KamenRiderOOO OOO]]''. Special mention must go to ''[[Series/KamenRiderDenO Den-O]]'', in which [[RearrangeTheSong eight actors collectively sing two songs with five remixes]], and ''[[Series/KamenRiderKiva Kiva]]'', which featured a "limited band" called TETRA-FANG and fronted by the star.
** All seven main combo themes for ''Series/KamenRiderOOO'' are sung by lead actor Shu Watanabe (Eiji Hino) himself. Two of them are also duets - "Time Judged All" with Ryosuke Miura (Ankh) and "Power to Tearer" with the legendary Akira Kushida (the voice of the OOO Driver).
* A lot of live-action sitcoms on Creator/DisneyChannel. Such shows include ''Series/ThatsSoRaven'', ''Main/CoryInTheHouse'', ''Series/HannahMontana'', ''Series/SonnyWithAChance'', ''Series/GoodLuckCharlie'', ''Series/WizardsOfWaverlyPlace'', ''Series/{{Jonas}}'', ''Series/ANTFarm'', ''Series/{{Jessie}}'', and ''Series/AustinAndAlly''. The list goes on.
** It's easier to list which ones which are aversions of the trope: ''Series/LizzieMcGuire'', ''Series/PhilOfTheFuture'', ''Series/TheSuiteLifeOfZackAndCody''/''On Deck'', ''Series/ShakeItUp'' and ''Series/DogWithABlog''. The second-to-last show is notable in that the theme is sung by Music/SelenaGomez of ''Wizards''.
* Since 2007, Creator/{{Nickelodeon}} does this a lot too. Music/MirandaCosgrove sings the theme song to ''Series/ICarly'' (starting with "iWill Date Freddie"), Music/VictoriaJustice sings the theme for ''Series/{{Victorious}}'', Music/KekePalmer sings the theme for ''Series/TrueJacksonVP'', and Big Time Rush sings the theme for... ''Series/BigTimeRush''.
** Only one Nick series averts this: ''Series/SamAndCat'', whose theme song used is a RealSongThemeTune: "Just Fine" by Michael Corcoran.
* ''Series/H2OJustAddWater'''s 3rd Season has the original opening song, "No Ordinary Girl", sang by Indiana Evans, the actress playing Bella. Averted with the first two seasons (which were performed by Ellie Henderson in season one and Kate Alexa in season two).
* Season two of ''Series/MyBabysittersAVampire'' has Vanessa Morgan singing the theme song, "Girl Next Door" (which was sung by Nerf Herder in season one, and also used for the Creator/{{Nickelodeon}} show ''Main/{{Unfabulous}}'')
* British actor Dennis Waterman has a history of doing this with the shows that he's in, including ''{{Minder}}'' and ''NewTricks''. This is spoofed in a recurring skit on ''Series/LittleBritain'', which invariably ends with Waterman losing work because of his insistence that he "write the theme tune, sing the theme tune..." to pretty much every job he's offered. (The other joke is the fact that the "Dennis Waterman" of the show, played by David Walliams, is repeatedly shown to be absolutely tiny, whereas the real Dennis Waterman is 5′9″ -- dead average.) The irony is that, although he sang the theme to ''{{Minder}}'', he didn't actually write it. That was done by his wife of the time ''Patricia'' Waterman.
** This parody was parodied on the Comic Relief special, with the real Dennis Waterman invading the Dennis Waterman sketch to point out the inaccuracies, and then sing the show's theme tune anyway.
* In ''Series/{{Frasier}}'', KelseyGrammer, who stars as the eponymous Dr. Frasier Crane in the show, sings the closing theme song, "Tossed Salads and Scrambled Eggs".
* The first theme to ''Series/TheDrewCareyShow'', "Moon Over Parma", was sung by Drew Carey.
* Creator/JossWhedon wrote the theme song for ''Series/{{Firefly}}''. There's an alternate version of the opening in the DVD boxset where he sings it himself (albeit not that well).
* GeneRoddenberry wrote the [[ForgottenThemeTuneLyrics lyrics]] to the ''Series/StarTrekTheOriginalSeries'' theme (allegedly just to have a claim on its copyright and a share in the royalties).
** As theme composer Alexander Courage wasn't keen on the lyrics and didn't come back to score any episodes of the series until after Roddenberry had left the show in the third season, it may not be just "allegedly."
* ''Series/{{Psych}}'' creator Steve Franks wrote and sang the theme song with his band, The Friendly Indians. He says that of all the times his name comes up in the show's credits, that's the one that makes him the happiest.
* Every iteration of the ThemeTune of ''Series/MysteryScienceTheater3000'' was written and performed by the show's stars - Joel Hodgson wrote the lyrics that appear during his five seasons on the show, and all the variations that appear during the Mike years were written by Mike Nelson himself. (Considering that Mike wrote about three out of every five songs performed on the show, this is not actually all that surprising.)
* "Final Frontier", the ThemeTune for ''Series/MadAboutYou'' was written by Paul Reiser, who starred in the show. (Note that the show ''also'' featured a ThemeTuneCameo on one occasion.) Reiser also played piano in the recording of the theme song.
* The theme tune to the 1970s American sitcom ''Series/{{Alice|1976}}'', "There's a New Girl in Town", was sung by Linda Lavin, who portrayed the title character.
* The theme to the 1980s British sitcom ''A Fine Romance'' (the [[RealSongThemeTune song]] "A Fine Romance", written by Jerome Kern and Dorothy Fields) was sung by the show's star, Dame Judi Dench.
* Creator/ZooeyDeschanel sings the theme song of ''Series/NewGirl''.
* The theme song for ''Series/HowIMetYourMother'' is sung by The Solids, a band that is made up of four guys, two of which are the show's creators, Carter Bays and Craig Thomas.
** And one step further: In a sixth-season episode, the cast ''performs'' the theme song.
* Folk singer John Tams played a regular supporting role in {{Sharpe}} and also wrote/arranged and sang most of its music.
* Subversion: The theme tune of ''Series/TwoAndAHalfMen'' ''appears'' (in the show's initial opening credit sequence) to be sung by the titular cast, but producer Chuck Lorre confirmed in 2005 at a convention that actors Charlie Sheen, Jon Cryer and Angus T. Jones are only lipsynching. The actual vocals were done by professional studio musicians -- notably, the one for Angus was an uncredited [[Film/PeeweesBigAdventure E.]][[WesternAnimation/{{Rugrats}} G.]] [[CrossDressingVoices Daily]].
** However, a TV spot for the show ''did'' feature the actors actually singing a set of gag lyrics to that title tune -- evidently commemorating its move to daily syndication, as the lyrics began with Charlie Sheen singing, ''"EV-ry day, we're ON ev-ry DAY now..."'' Comparing Sheen's and Cryer's actual singing voices to the sound of the theme ''should'' have put this trope to rest for the show, but unfortunately ViewersAreMorons.
* On the subject of Chuck Lorre, ''Series/TheBigBangTheory'''s theme song, written and performed by the Music/BarenakedLadies, was ''mistaken'' for this by a few people who believed that Creator/JimParsons sang it.
** The same thing happened with ''Series/{{Smallville}}''ís theme song. The lead singer of Remy Zero, the band that performed "Save Me", bears an uncanny resemblance to Michael Rosenbaum (SelfDemonstrating/LexLuthor).
** Similarly, some people thought that Richard Sanders sang the ''Series/WKRPInCincinnati'' theme song. But he played Les Nessman and WordOfGod holds that the lyrics were written from the perspective of Andy Travis, who was played by an actor (Gary Sandy) who had singing experience in musicals. It was actually performed by session singer Steve Carlisle.
* The theme tune of ''Series/TwentyOneJumpStreet'' was performed by Holly Robinson, who played Officer Judy Hoffs on the show (with the "JUMP!" shout provided by Johnny Depp and Peter [=DeLuise=]).
* ''WalkerTexasRanger''. ChuckNorris. "Eyes of the Ranger".
* The two theme tunes of ''Series/OnlyFoolsAndHorses'' are sung by John Sullivan, the series creator.
** Something that some people have noticed about the way Sullivan sings it is that he sounds like one of the main characters, Rodney. A few people did indeed think that Nicholas Lyndhurst was the one singing it.
* Parodied in ''Series/GarthMarenghisDarkplace'': The opening is "based on melodies originally whistled by Gath Marenghi".
* Both ''Series/TheHoneymooners'' and ''The Jackie Gleason Show'' featured theme music written by Jackie Gleason himself (Gleason put out numerous albums, but as a conductor rather than a singer).
* David Naughton (better known as the "Dr. Pepper" guy and as ''Film/AnAmericanWerewolfInLondon'') both starred in and sang the theme song for the shortlived 1978 sitcom, ''Makin' It''. Ironically, though the show was a flop, the song was a hit.
* The theme song for ''RoundTheTwist'' was sung by Tamsin West, who played the original Linda.
* Creator/CraigFerguson sings the theme song for his late-night chat show ''TheLateLateShow With Craig Ferguson'', and also co-wrote the lyrics. And yes, he's really playing the drums in the opening segment.
* Carroll O'Connor wrote the (never heard on the show) lyrics to "Remembering You," the closing instrumental theme song for ''Series/AllInTheFamily''. Also, of course, the opening theme "[[http://www.youtube.com/watch?v=oV5LQcmuGg8 Those Were The Days]]" was sung (on camera) by O'Connor and Jean Stapleton.
* Paul [=McDermott=], host of ''GoodNewsWeek'', sings the theme tune (a cover of Hedgehoppers Anonymous' ''Good News Week'').
* The theme to ''Series/TheFreshPrinceOfBelAir'' was performed by Creator/WillSmith.
* The theme tune for the first season of ''Series/{{Campion}}'' was sung by lead actor Creator/PeterDavison.
* The theme song to ''Series/{{Reba}}'' is somewhere between this and RealSongThemeTune, since it's a partial rewrite of Music/RebaMcEntire's 2002 single "I'm a Survivor".
* [[Series/TopGear James May]] wrote the theme tune to his own series, ''Series/JamesMaysManLab''. Given his musical background, it's not terribly surprising.
* The opening theme from ''Series/{{Bottom}}'' was written and performed by The Blue Notes, Adrian Edmondson's band. They also played the cover of "Last Night" that runs under the closing credits.
* Beginnning in its second season, ''Series/TheBradyBunch'' had its theme song performed by the show's six child actors (as well as that of ''WesternAnimation/TheBradyKids''.)
* Lee Majors sang the theme song from ''Series/TheFallGuy'', "The Unknown Stuntman" (co-written by the show's creator, Glen A. Larson, who wrote or co-wrote the themes for many of his shows and thus paved the way for Creator/JJAbrams).
* ''Series/EverybodyHatesChris'' almost had one of these. Cast member Tichina Arnold wrote and performed her own song, but ultimately an instrumental theme tune was chosen instead. A small snippet of the song became the iconic "Everybody Ha-ates Chris!" riff at the act-breaks and [[EveryEpisodeEnding end of every episode]].
* Greg Evigan shares ownership of this trope with Dennis Waterman, having done this ''four'' times, first with shortlived '70s sitcom ''A Year At The Top'' - justified as it was a show about a pair of musicians, played by Evigan and Paul Shaffer (!) - then with ''BJ and the Bear'', ''Series/MyTwoDads'' (which he also performed on screen in one episode, leading Paul Reiser to wonder where he'd heard that song before) and ''[[http://www.youtube.com/watch?v=A6QB2Y22mAs P.S. I LUV U]]''.
* The ''{{Rentaghost}}'' theme tune was written and sung by Michael Staniforth, who played Claypole on the show.
* ''Series/PowerRangersDinoThunder'' executive producer Douglas Sloan co-wrote its theme song.
* ''Series/UltramanLeo'' has its first theme song performed by main star Ryu Manatsu. He did a rerecording a few decades later.
* Nell Carter sang the theme song for ''Series/GimmeABreak''.
* Music/WaylonJennings should be considered part of the cast for ''Series/TheDukesOfHazzard'', right? He sings the theme song (a.k.a. "Good Ol' Boys") ''and'' he narrates each episode.
* Music/QueenLatifah performed the theme for ''Series/LivingSingle''.
* Cybill Shepard sings the theme to ''{{Cybill}}'' herself.
* Marla Gibbs sings "There's No Place Like Home", the theme tune to ''227'' of which she is the star.
* ''Series/{{Watching}}'' begins and ends with ditties sung by Emma Wray in-character as Brenda.
* Creator/MervGriffin composed the theme song and JeopardyThinkingMusic for the original 1964-1974 version of ''Series/{{Jeopardy}}'' When the show was brought back in 1984, an adaptation of the latter became the show's BootstrappedTheme, which is still used in rearranged form to this day.
** Originally averted with ''Series/WheelOfFortune'', which originally used Creator/AlanThicke's "Big Wheels", but changed to Merv's own "Changing Keys" in 1983. During most of the 80s and 90s, Merv also composed various music beds used throughout the show. Versions of "Changing Keys" were used until 2000, when they were replaced by a theme by Steve Kaplan, and then the current one composed by Frankie Blue and John Hoke.
** Going a little further back, Griffin wrote the theme for the first game show he produced, 1963's ''Word For Word''. Griffin hosted the show as well.
* BearInTheBigBlueHouse's theme is sung by the main characters.
[[/folder]]

[[folder: Professional Wrestling]]
* Wrestling/ShawnMichaels sang his own theme song after he broke off with the previous singer and his then-manager, Sensational Sherri. He used the same song for over a decade [[TheArtifact despite having dropped the "sexy boy" gimmick it was originally written for]], and kept it right until retirement.
* Wrestling/JohnCena, due to the rapper gimmick he used to have, made his last two themes, one of which is still being used despite, as with Michaels, having long since dropped said gimmick.
* [[Wrestling/RonKillings R-Truth]] not only raps his own theme but puts on a live performance of said theme as part of his entrance. He's done this pretty much ever since he started wrestling, having done so in Wrestling/{{TNA}} as Ron Killings and in his first WWF stint as K-Kwik.
* The WWE produced an album called ''WWE Originals'' which were songs all sung by the wrestlers or divas on the roster. Some were used briefly as actual themes for the respective wrestlers; briefly because, despite the valiant efforts of [[CrowningMusicOfAwesome Jim Johnston]], the world learned that professional wrestlers do not make for great singers (except Chris Jericho, who already was a singer and Lillian Garcia, whose not a wrestler) Well, despite "Put A Little Ass On It" being laughably terrible, Rikishi did happen to be a REALLY good singer and John Cena's "Basic Thuganomics did have some longevity"(but that's rapping, not singing)
* Wrestling/JillianHall sings her theme music "Sliced Bread," which adds to [[HollywoodToneDeaf her gimmick of being an absolutely AWFUL singer.]]
* Shannon Moore's final WWE theme song was an instrumental of a song he'd written & recorded.
* Wrestling/JeffHardy's theme songs in TNA are written & performed by him. They were performed with his band Peroxwhy?gen.
* Wrestling/ChrisJericho's band, Fozzy, has had their songs as themes for a few of WWE's pay-per-view events, most recently "Martyr No More" for the 2010 Royal Rumble. Averted as far as Jericho using a Fozzy song as his theme. He only used Fozzy's "Don't You Wish You Were Me?" for about a week.
* Borderline examples but there's a whole host of wrestlers whose catchphrases make it into their themes, usually at the beginning. Notable examples include [[Wrestling/DwayneJohnson The Rock]], New Age Outlaws, Wrestling/{{Carlito| Colon}}, Finlay, Wrestling/TheMiz, Wrestling/ZackRyder, and, most recently, Wrestling/{{Ryback}}.
* Wrestlers in TheEighties often sung their own songs such as The Fabulous Rougeau Brothers, Wrestling/HillbillyJim, and [[Wrestling/HonkyTonkMan the Honky Tonk Man]].
* Michael Hayes wrote and sang The Freebirds' "Badstreet U.S.A."
* Wrestling/MontelVontaviousPorter went out and recorded his second WWE entrance theme without in put from the company. They, accordingly, [[ChorusOnlySong played nothing but the chorus of it]], though Wrestling/NewJapanProWrestling not only played the whole thing but remixed the beat and even added Godzilla's roar to the track. He then used one of his already released themes for his youtube sessions, did another for his New Japan run with [[Wrestling/TheWorldsGreatestTagTeam Shelton Benjamin]] and did a another theme for his Wrestling/{{TNA}} run.
[[/folder]]

[[folder: Video Games]]
* The ending theme to ''VideoGame/{{Portal}}'' is sung by EllenMcLain in character as [=GLaDOS=], complete with the electronic voice distortion and unsettling inflections of the original. Keep in mind that [=McLain=] is a trained opera singer.
** Which gets shown much more [[spoiler:with the singing turrets (whom she also voices) and the ending theme of ''VideoGame/{{Portal 2}}'']]
* "Freesia", a prominent theme heard throughout ''VideoGame/MegaManZero 4'', is sung by Creator/RieTanaka, who also voices the female lead, Ciel.
* In ''VideoGame/BlazBlue'', one of the fight themes is a vocal version of Noel's theme song. It was written and performed by, naturally, her voice actress.
* ''VideoGame/SuperRobotWars [[VideoGame/SuperRobotWarsOriginalGeneration OG Saga:]] [[EndlessFrontier Endless Frontier EXCEED]]'' main heroine is voiced by NanaMizuki. And given her recent popularity, it wasn't a surprise that she sings the opening theme for the game.
* In the ''Franchise/TokimekiMemorial'' series, the openings and endings of all Hibikino Saga games (''Tokimeki Memorial 2'' and its spin-offs) save for ''Leaping School Festival'' (and ''Dancing Summer Vacation'' for the endings) are sung by Creator/JunkoNoda, the voice actress of the Hibikino Saga's main heroine Hikari Hinomoto.
** Similarly, most of the openings and endings of the games of the Classic Kirameki Saga (''Tokimeki Memorial''1 and its spin-offs) are sung by Creator/MamiKingetsu, the voice actress of this saga's main heroine Shiori Fujisaki. Exceptions are the Drama Series games, with the endings of ''Nijiiro no Seishun'' sung by Creator/SachikoSugawara, who voiced this game's heroine Saki Nijino, and ''Irodori no Love Song'', all three possible ending songs being sung by Masayo Kawaguchi, voice actress of this game's heroine Ayako Katagiri.
* In the ''VideoGame/MitsumeteKnight'' games, all the openings and endings (save for the Anne specific ending song, sung by her voice actress, Creator/MarikoKouda) are sung by Creator/HirokoKonishi, who voiced the series' main heroine Sophia Robelingue.
[[/folder]]

[[folder: Web Original]]
* LetsPlay/ChimneySwift11 sings the intro for the sixth season of the '' Minecraft Files''.
* All the music in ''Machinima/ReynaldoTheAssassin'' (theme tune and otherwise) is done by director/TalkingToHimself actor Oneclipleft.
* ''"Do You Wanna Date My Avatar,"'' the single for the hit WebOriginal ''WebVideo/TheGuild'', was both written and performed by FeliciaDay, the creator (and star) of the show. Well, co-written. She wrote the lyrics, and Jed Whedon wrote the music. The music video is peopled with the main cast of the show.
* [[WebVideo/TheNostalgiaChick Lindsay Ellis]] sings "Goodbye Internet's Rose" when Nella meets her fate at the hands of a ladder.
[[/folder]]

[[folder: Western Animation]]
* ''[[WesternAnimation/{{Sixteen}} 6Teen]]'' has the theme song sung by characters Wyatt and Jude.
* The theme song for ''AtomicBetty'' was sung by the title character's voice actress, as well as many other songs featured in the show.
* Brendon Small was responsible for nearly all the music on ''WesternAnimation/HomeMovies'', including the theme song. He also writes the music for ''WesternAnimation/{{Metalocalypse}}'' and voices three of [[FakeBand Dethklok's]] five members, including lead singer Nathan Explosion.
* One of the {{DVD commentar|y}}ies for ''WesternAnimation/{{Futurama}}'' has Creator/BillyWest (in character as [[CloudCuckoolander Fry]]) state that the theme song needed lyrics and sing the word "Futurama" in time to the music over the end credits.
* The Creator/{{Disney}} series ''WesternAnimation/PepperAnn'' has Kathleen Willhoite, voice actor for the main character, do the theme song.
* Queen Alina in the last bit of ''WesternAnimation/SonicUnderground'': "I long for my children but I have to wait. To act too soon could seal their fate."
* ''WesternAnimation/AsToldByGinger'''s original theme was done by the title character's voice actress, Melissa Disney. After that, it was sung by singer Macy Gray.
* ''WesternAnimation/LittlestPetShop2012'' has [[Music/HeyOcean Ashleigh Ball]] singing the theme song as her character, Blythe Baxter.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' is an interesting case, as most of the main characters have different vocal talent during singing roles. The trope is subverted by Twilight, Pinkie Pie and Rarity, but played straight with Rainbow Dash, Applejack and Fluttershy.
** A slightly weird example of this trope, as Pinkie Pie and Fluttershy [[Creator/AndreaLibman share a voice actress]].
** Except where the individual main characters chime in with their solo lines, the majority of the theme song (and all of the two-minute version) is sung by Creator/RebeccaShoichet (Twilight) and Shannon Chan-Kent (backup vocals).
** The Japanese dub also falls into this, as the first and third openings, "Mirai Start" and "Yumemiru! Shinjiru! Mirai Kanaete!" are sung by Pinkie Pie's dub VA, Suzuko Mimori.
* The theme for ''WesternAnimation/FamilyGuy'' is sung by the voice actors of the Griffin family.
** Also, Mike Henry, who voices Cleveland, appropriately sings ''WesternAnimation/TheClevelandShow'' theme.
** Creator/SethMacFarlane, as Stan Smith, sings the ''WesternAnimation/AmericanDad'' theme song.
* The theme song from ''WesternAnimation/SouthPark'' features lines by Stan and Kyle, Cartman, and an unintelligible one by Kenny. (the latter replaced by Timmy singing his own name in season 6)
* ''WesternAnimation/JaneAndTheDragon'' has Jane singing part of the theme song.
* The ''WesternAnimation/HongKongPhooey'' theme song was sung by his voice actor, Benjamin "Scatman" Crothers.
* ''WesternAnimation/DastardlyAndMuttleyInTheirFlyingMachines'': Creator/PaulWinchell performed the theme song in character as Dick Dastardly.
* [[TwoWordsObviousTrope One word:]] ''WesternAnimation/{{Animaniacs}}''. The theme song is mostly sung by the Warners, with the last set of lines sung by the entire cast.
* The ''WesternAnimation/TinyToonAdventures'' theme song is mostly sung by Buster and Babs Bunny ([[RunningGag no relation]]), with Plucky joining in for a few lines.
* The theme tune for ''WesternAnimation/WatchMyChops'' uniquely combines this with ExpositoryThemeTune: Corneil (a talking dog) starts out singing the theme tune on his own, until dogsitter Bernie comes in, realizes Corneil can talk, and most of the rest of the song is a duet that sums up the premise of the show (Bernie must hide the fact that Corneil can talk from everybody else).
* The theme song for ''{{Hammerman}}'' is sung by MCHammer himself.
* The Japanese dub for ''WesternAnimation/AdventureTime'' has the opening performed by Finn and Jake's dub [=VAs.=] In the original, it was performed by series creator Creator/PendletonWard--technically also making it an example because he also voices some characters, mostly notably Lumpy Space Princess.
* ''WesternAnimation/SofiaTheFirst'' is another one to mash-up this and ExpositoryThemeTune, as the title song is done by Sofia herself.
* The theme for ''WesternAnimation/StevenUniverse'' is sung by the main cast, in-character, and includes some lovely harmony. It even initially appeared in canon in the pilot episode as a song that Steven himself wrote.
* ''TheHairBearBunch'' theme is performed by the voice actors of the bears--Daws Butler (Hair Bear), Paul Winchell (Bubi), and Bill Calloway (Square).
* The theme for ''The Scooby Doo-Dynomutt Hour'' (1976) originally had the voice actors (Frank Welker, Casey Kasem, Pat Stevens, Heather North) performing the theme. When the Scooby episodes were prepped for syndication in 1980, the opening was revamped without Dynomutt and the voice actors replaced doing the theme (with new lyrics) by unidentified performers.
** When Dynomutt got his own half-hour, the theme for it was expanded from the segment intro on ''Scooby-Doo/Dynomutt'' and was performed (spoken) by the two main voice actors, Gary Owens and Frank Welker.
* Grojband frontman Corey Riffin gives us a catchy little expository tune at the beginning of each episode to explain what his band does.
* The theme song to SpongeBobSquarePants is sung by Patchy the Pirate, a character who appears during specials of the show.
* {{Caillou}}'s theme song is sung by the titular character.
* LittleEinsteins' theme song was sung by the main four characters.
* ''WesternAnimation/{{Chowder}}'''s theme is sung by its main cast in-character. Since this includes [[TheUnintelligible Shnitzel]], one of the lines ends up being "Radda radda radda, radda radda ra!"
[[/folder]]
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