->''"Don't I know you?"''
-->-- '''[[Creator/DavidWarner Lord Vultare to Baydool]]''', ''Film/QuestOfTheDeltaKnights''

A guest appearance by someone with a personal or prior professional relationship with one of the cast members of the show, such as Rhea Perlman appearing on ''Series/{{Becker}}'', Christopher Lloyd appearing on ''Series/SpinCity'', or Helen Hunt appearing on ''WesternAnimation/TheSimpsons''. More often than not the guest actor will be playing an OldFriend of the relevant character, whom they haven't seen in years.

Subtrope of CastingGag. Liable to be a LargeHam. Expect numerous {{Actor Allusion}}s. Compare RealLifeRelative. Not to be confused with OldFriend, RememberTheNewGuy or BeleagueredChildhoodFriend, but can overlap with any of them. Compare RelationshipVoiceActor.


* Episodes 42 and 43 of the ''Manga/AngelHeart'' anime series involves [[Manga/CityHunter Ryo Saeba]] (who is voiced by Creator/AkiraKamiya) dating a news reporter voiced by Creator/YurikoYamamoto. Kamiya and Yamamoto previously played [[StarCrossedLovers Kenshiro and Yuria]] in the original 80's version of ''[[FistOfTheNorthStar Hokuto no Ken]]''.
* ''LightNovel/SpiceAndWolf'' appears to do this in both Japanese and English. In the former, the two leads are played by Creator/JunFukuyama and Creator/AmiKoshimizu, who also played opposite each other as Lelouch and Kallen in ''Anime/CodeGeass''. In the latter, the leads are played by Creator/JMichaelTatum and Creator/BrinaPalencia, who also play the leads in ''Manga/BlackButler''.

* All Creator/ChristopherGuest films feature members of his ProductionPosse in different combinations, but it is particularly noticeable in ''Film/AMightyWind''; the Folksmen are played by the three main members of [[Film/ThisIsSpinalTap Spinal Tap]]. The video for a song from their 60s folk rock phase is clearly a ShoutOut to "Listen To The Flower People".
* Extreme example: All sorts of hilariously awkward dialogue of this sort occurs between the BigBad (Creator/DavidWarner) and TheMentor (Creator/DavidWarner) in the ''Series/MysteryScienceTheater3000''-featured film ''Film/QuestOfTheDeltaKnights''.
-->'''Crow''': "Creator/DavidWarner, you're under arrest by the order of Creator/DavidWarner!"
* In ''Film/{{Maverick}}'' (directed by Richard Donner), Bret Maverick (played by Creator/MelGibson) is in a bank that is held up by a gang, one of whom is played by Danny Glover (Gibson's co-star from the ''Film/LethalWeapon'' movies, also directed by Donner); the two men almost appear to recognise each other, but then dismiss the notion. (Then, to cement the association, as Glover's character is mounting his horse for a getaway he is heard to say, "I'm gettin' too old for this shit!" - Roger Murtaugh's famous catchphrase from ''Film/LethalWeapon''.)
* In the epilogue of ''Film/HarryPotterAndTheDeathlyHallows, Part 2'', [[spoiler: Draco Malfoy's wife is played by Tom Felton's real-life girlfriend]].
* In ''The Senator Was Indiscreet'', a Creator/WilliamPowell vehicle, the final scene reveals that his wife, unseen till now, is Myrna Loy, who co-starred as his wife in numerous movies including ''Film/TheThinMan'' series.
* Seeing James Spader as the main villain opposing a group led by Robert Downey Jr. in ''Film/AvengersAgeOfUltron'' is amusing, considering the two had previously worked together a few times in the 1980s. They actually played best friends in ''Tuff Turf'', as well as slightly antagonistic associates in ''Film/LessThanZero''.
* Creator/JohnCho and Creator/AntonYelchin, who played Sulu and Chekov in the ''Franchise/StarTrek'' "Kelvin Timeline" films that started with [[Film/StarTrek the 2009 reboot]], previously crossed paths before in the 2001 film ''Delivering Milo''.
* ''Disney/BeautyAndTheBeast'' featured Jerry Orbach as Lumiere and Creator/AngelaLansbury as Mrs. Potts. They were very good friends, having worked together on Broadway and television. Notably, Orbach had a recurring role as hardboiled detective Harry [=McGraw=] in Landsbury's ''Series/MurderSheWrote''.

[[folder:Live Action TV]]
* Bob Newhart's first sitcom wife, Suzanne Pleshette (in ''Series/TheBobNewhartShow''), showed up in the final episode of his second sitcom (''Series/{{Newhart}}''), where it turned out the whole later series (in which he played a New England innkeeper) [[spoiler:was AllJustADream]].
** Tom Poston, who played George Utley on ''Series/{{Newhart}}'', had been a recurring guest star on the earlier show as "The Peeper".
** One episode of the later show had Newhart's Dick Loudon running into the first show's Mr. Carlin (Jack Riley).
** Bill Daily (annoying neighbor Howard Borden from ''The Bob Newhart Show'') guest-starred as Dick Loudon's annoying neighbor on ''Newhart''.
* Creator/TimDaly appeared as himself in an Episode of ''Series/{{Monk}}''. He and ''Monk'' star Creator/TonyShalhoub previously appeared together in the series ''Series/{{Wings}}''.
** Lampshaded by the fact that Monk doesn't know who Tim Daly is. His assistant tells him that Daly was on ''Wings'' and was the only good actor on the show.
** In another episode, Steven Weber, also from ''Series/{{Wings}}'' appeared. He was not playing himself, however, and no mention of the show was made.
** In "Mr. Monk Takes Manhattan," Captain Stottlemeyer (TedLevine) has some friction with New York Police Department Captain Walter Cage, who is played by Mykelti Williamson. Williamson and Levine played two fellow LAPD homicide detectives in ''Film/{{Heat}}''.
* In ''Series/{{Wings}}'', Tim Daly's real life sister Tyne Daly guest starred as a wealthy woman who wanted Brian as her gigolo.
** Amy Yasbeck's husband John Ritter appeared as her character's sleazy ex-husband Stuart. The two have a long history of playing couples having appeared together in ''Problem Child'' 1 and 2 as well as ''The Cosby Show''.
** Amazingly, their Cosby Show and Problem Child appearances together occurred 6 years before they even started dating.
* The secretary [[spoiler: who turns out to have the jade pin]] in the ''Series/{{Sherlock}}'' episode "The Blind Banker" is Olivia Poulet, former girlfriend of Benedict Cumberbatch, who plays Sherlock.
* ''Series/NashBridges'' had a double-header with the episode "Wild Card", reuniting stars Don Johnson and Cheech Marin with their former partners [[Series/MiamiVice Philip Michael Thomas]] and [[Creator/CheechAndChong Tommy Chong]]. Thomas's character even made a second appearance in season six's "Out of Miami".
* Creator/CharlieSheen loves to do this in his shows: in ''Series/TwoAndAHalfMen'' a long time friend of Charlie's is introduced at the start of an episode. One close enough that Charlie refers to him as ''the brother I never had.'' The actor portraying said friend? Emilio Estevez, real-life brother to Charlie. A second example also exists when the character Rose introduces her father, portrayed by Creator/MartinSheen.
** This happens again in his new show, ''[[Series/AngerManagement Anger Management]]''. Charlie has an estranged father, a character once more played by none other than... Creator/MartinSheen.
** Jon Cryer and Angus T. Jones had guest roles on ''Series/HannahMontana'', while ''Hannah'' stars Music/MileyCyrus and EmilyOsment had individual guest roles on episodes ''[[Series/TwoAndAHalfMen Two and a Half Men]]'' (albeit, both episodes during Ashton Kutcher's run).
* Katey Sagal played Kaley Cuoco's mother in ''Series/EightSimpleRules'', and then years later in ''Series/TheBigBangTheory''.
* When Brad Pitt appeared on ''Series/{{Friends}}'', his character was an old acquaintance of Creator/JenniferAniston's . However, he hated her and she barely remembered him.
** Which also makes it a bit HarsherInHindsight considering what happened in real life...
** As well as Tate Donovan, who appeared earlier on the same show when ''he'' was dating Jennifer Aniston.
*** As well as Julia Roberts, who dated Matthew Perry, and David Arquette, who married Courteney Cox (though technically Arquette appeared well before he and Cox became involved, his character didn't even share a storyline with Cox's character Monica)..
*** Creator/BruceWillis also appeared for a guest run, free of charge, after losing a bet to Matthew Perry on the set of their film ''The Whole Nine Yards''. Similarly, Willis's character intimidates Chandler a bit (although moreso Ross, who's dating the daughter of Willis's role) just like in the movie.
* With LampshadeHanging, Michael J. Fox's last episode of ''Series/SpinCity'' began with him complaining over the phone to his therapist for sending him to meet with a substitute. He says, "You're almost like a father to me. How am I supposed to have that with some new guy?" and in walks the substitute therapist, played by Michael Gross, who played Michael J. Fox's father in ''Series/FamilyTies''.
** Then the new therapist told him to "pay Mallory on the way out."
** Another episode had Creator/ChristopherLloyd appear as Fox's old mentor, complete with ''Franchise/BackToTheFuture'' lampshading.
** And one episode had Meredith Baxter (Fox's mother on ''Series/FamilyTies'') as his character's mother.
** One episode had Tracy Pollan (Fox's wife) appear as an old girlfriend.
* Arguably the ''Series/LawAndOrder'' mothership's biggest guest star was Julia Roberts. She was dating series regular Benjamin Bratt at the time. [[spoiler: Her character uses a fabricated story about having a relationship with Bratt's Detective Curtis in order to get out of a murder charge.]]
* On ''Series/LawAndOrderSpecialVictimsUnit'': Creator/AndreBraugher appears as defense attorney Bayard Ellis. When Ellis sees Detective Munch, he does a double-take and asks, "Have we met?" Braugher played Detective Frank Pembleton on ''Series/HomicideLifeOnTheStreet'', on which Detective Munch originated. Munch later tells Bayard, "I admire your second act."
* Likewise, the late Creator/DavidCarradine guest starred on ''Series/LizzieMcGuire'' as an old friend of the father who was "Like a brother to me." The actors actually [[RealLifeRelative were brothers]].
* Between the three of them, ''Series/StargateSG1'', ''Series/{{Andromeda}}'' and ''Series/{{Farscape}}'' pulled this numerous times: Michael Shanks and Christopher Judge both detoured from the SGC to appear as AI Avatars in an episode of ''Andromeda''. Claudia Black's second guest appearance on ''SG-1'' coincided with Ben Browder's introduction to the cast (with, as SG-1 is wont to do, LampshadeHanging), and with the guest appearance of Lexa Doig (who played the titular ''Series/{{Andromeda}}'''s several humanoid forms--and is actually married to Michael Shanks).
** Also, Richard Dean Anderson knew Chris Judge and Creator/DonSDavis from ''Series/{{MacGyver}}''.
** Michael Shanks was the guest star of one episode of ''Series/{{Sanctuary}}'', a show on which Creator/AmandaTapping has the lead role.
* Cast as Peter Hunt, an old flame of Candice Bergen's titular character ''Series/MurphyBrown'', Scott Bakula ended his recurring role on the show by entering an elevator and "leaping" a la ''Series/QuantumLeap'', which series had recently ended.
** Bakula then showed up as an old flame of Shirley Schmidt on ''Series/BostonLegal''. Shirley is, of course, played by Creator/CandiceBergen.
* Scott Bakula also was imprisoned by his ''Series/QuantumLeap'' sidekick Dean Stockwell in ''Series/StarTrekEnterprise''.
* Creator/BillCosby welcomed Robert Culp onto ''Series/TheCosbyShow'' episode "Bald and Beautiful", reprising their teamup in ''Series/ISpy''. He also welcomed Rita Moreno onto the episode, "You Only Hurt the One You Love", reprising their appearances together on ''Series/TheElectricCompany1971''.
* ''Series/GilmoreGirls'': In one episode near the end of season 4, Michael [=DeLuise=]'s character's bachelor party includes his real-life brother, David [=DeLuise=]. To top it all off, the Girls are seen watching a movie starring Michael's father, Creator/DomDeLuise. All of the above [=DeLuises=] have also had small parts on ''Series/StargateSG1'' and ''Series/SeaquestDSV''.
** Michael, Peter and Dom [=DeLuise=] also appear as siblings and father respectively for David's character in an episode of ''Series/ThirdRockFromTheSun''.
* Gratuitous example: Tea Leoni (Mrs Duchovny) and Garry Shandling appearing in ''Series/TheXFiles'' as themselves playing Mulder and Scully in a movie.
* In ''Series/EightSimpleRules'', Cate Hennessey (played by Katey Sagal) encountered an old boyfriend named Matt... who is played by Creator/EdONeill, aka [[Series/MarriedWithChildren Al Bundy]].
* ''Series/{{Smallville}}'':
** Tom Wopat appeared as an old friend of John Schneider's Jonathan Kent character. Both actors starred on ''Series/TheDukesOfHazzard''. They even had some {{Mythology Gag}}s: They had them riding around in Wopat's character's car, which looked suspiciously like the ''General Lee'', and even repeated the old Dukes of Hazzard gag of the passenger side door not working and having to climb in through the window. Lex referred to Wopat as Jonathan's "Good Ole Boy", a reference to the ''Dukes'' theme song. They even mentioned several {{Noodle Incident}}s involving Jonathan and Wopat's character outrunning the local sheriff when they were young!
** A double helping happened on the same show, when Margot Kidder showed up, playing a colleague of Christopher Reeve's character. While they were never in the same episode, this case also had its own Mythology Gag; when Martha questions whether Kidder's character and Chris Reeve's character ever had a relationship, to which Kidder's character wistfully replies [[Film/{{Superman}} "In another lifetime..."]]
* Tahj Mowry, younger brother of Tia and Tamera Mowry, guest starred three times on their show ''Series/SisterSister'' (this is also an example of a YouLookFamiliar, since he played a different character each time.) They returned the favor by appearing on his show, ''Smart Guy''.
* ''Series/KungFu''
** The show featured a old preacher named Serenity Johnson in a few episodes. He was played by John Carradine, father of show star, David Carradine.
** The first episode with him also featured a teenage Robert Carradine (David's brother/John's son) as Serenity's mute sidekick, Sunny Jim.
* In an episode of ''Series/BoyMeetsWorld'', one of Cory's college professors is played by Fred Savage, the brother of Cory's actor, Ben Savage.
** Eric Matthews' best friend Jason was played by Creator/WillFriedle's real-life best friend [[TheDanza Jason Marsden]]. This isn't the first or last time the two of them played a pair of HeterosexualLifePartners
* In the Pamela Anderson sitcom ''Stacked'', Pam's character gets visits from old friends played by Carmen Electra (Anderson's co-star in ''Series/{{Baywatch}}'') and Jenny [=McCarthy=] (who appeared with Anderson in ''Scary Movie 2''). [=McCarthy=] and Anderson were also Magazine/{{Playboy}} Playmates.
* In the S1 finale of the (surprisingly watchable) Courteney Cox Arquette vehicle ''Series/{{Dirt}}'', Jennifer Aniston turns up as a rival tabloid editor. [[GirlOnGirlIsHot They actually kiss]], [[DistractedByTheSexy in front of some people at the newsdesk]]
* Almost subverted in ''Series/BabylonFive''. When June Lockhart made a guest appearance, J. Michael Straczynski refused to write a scene in which her character meets Lennier, played by her ''Series/LostInSpace'' co-star Bill Mumy, as there was no logical reason for the two to meet except for such a joke. However, Mumy himself wanted to do an in-joke about it, and so without permission he snuck into one of her scenes out of his alien makeup as an extra and gave a quick smile to her.
* In an episode of ''Series/{{Coach}}'', Luther (played by Jerry van Dyke) learns that he was adopted and ends up attending a reunion of his birth family. As he enters he complains to Hayden that there's no way he could be related to any of these people. An unnamed character (played by Creator/DickVanDyke) chooses that moment to walk conspicuously across the set.
* Adrian Edmondson could have been cast in ''Series/{{Blackadder}} Goes Forth'' for the sole reason of appearing against Rik Mayall, his long-time work partner. In their double-act most of the constant violence (and occasional gay jokes) are directed at Mayall, so it seems too much of a co-incidence that [[spoiler:Mayall's Flashheart immediately shoots Edmondon's Red Baron]] and loudly proclaims "What a '''poof!'''"
* ''Series/WhatILikeAboutYou'' brought in (in various episodes spread throughout 4 years): Chelsea Brummet (of [[Series/AllThat Amanda Bynes' first show]]), Sparkle (from Bynes' film ''Film/BigFatLiar''), Tamara Mello (of [[Series/{{Popular}} Leslie Grossman's previous show]]), and '''three''' of Jennie Garth's [[Series/BeverlyHills90210 ex-co-stars]] (Ian Ziering once, Jason Priestly twice, & Luke Perry thrice).
** Does it count if the two were never on the show at the same time? Because Amanda Bynes was on ''Series/AllThat'' before the complete-cast makeover; Brummet was after the reboot.
*** See below; Bynes guest-starred in a post-reboot episode.
** On a similar note, ''Series/AllThat'' post-reboot often played around with this, bringing on former cast members as guest stars (and also having a hilarious interaction between guest star Britney Spears and recurring character Thelma Stump, played by Britney's younger sister Jamie Lynn.)
* Creator/AmySedaris' interview on ''Series/TheColbertReport'' for the ''Series/StrangersWithCandy'' movie should have been one of these, but the ''character'' Creator/StephenColbert wasn't in ''Strangers with Candy''. It turns out in the Report universe, Chuck Noblet was played by Kevin Spacey.
* ''Series/SpinCity's'' Richard Kind, Michael Boatman, Alan Ruck, Barry Bostwick, Alexander Chaplin, Heather Locklear and of course Michael J. Fox have all appeared in Bill Lawrence's ''next'' show, ''Series/{{Scrubs}}''.
** Music/MandyMoore guest-starred as a love interest to then-boyfriend Creator/ZachBraff in season 5.
* ''Series/{{Angel}}'' co-stars Christian Kane (Lindsey [=McDonald=]) and Creator/SamAnderson (his evil boss Holland Manners) were reunited in an episode of ''Series/{{Leverage}}''. Kane (Eliot Spencer) was part of a con against Anderson's one-episode character, and says that they winked at each other on-screen to reference their history.
** Recently so did Adam Baldwin as an actual old friend, once ins a cameo later in a full episode.
** Creator/SamAnderson and Daniel Dae Kim co-star in ''Series/{{Lost}}''. They don't share a few quips about going from playing evil lawyers to castaways on a weird island?
* Another example with ''Series/{{Angel}}'' actors: Creator/DavidBoreanaz went from playing the title character in ''Series/{{Angel}}'' to Agent Booth in ''Series/{{Bones}}''. While there, he encountered Creator/AdamBaldwin, who played both a fellow FBI Agent (''Series/{{Bones}}'') and a liaison to the Senior Partners (''Series/{{Angel}}''), and Gina Torres, a murder suspect (''Series/{{Bones}}'') and a demoness (''Series/{{Angel}}''). Interestingly, although Baldwin and Torres did not appear in the same episode, both were regulars on ''Series/{{Firefly}}'', which was also by Creator/JossWhedon, the creator of ''Series/{{Angel}}''.
** And ''Series/{{Bones}}'' regular TJ Thyne (Dr. Jack Hodgins) had unnamed guest spots in the final seasons of ''Series/{{Angel}}''.
** From another direction, ''Bones'' had a one-off episode in which Bones' second cousin appears. Who else should show up in such a role other than Emily Deschanel's [[RealLifeRelative little sister]] [[Creator/ZooeyDeschanel Zooey]]?
* ''Series/InPlainSight'' stars Mary [=McCormack=], who played Kate Harper on ''Series/TheWestWing''. In the second season, her character's sister dates a character played by Joshua Malina. Malina's and [=McCormack's=] characters dated on TWW, and there is an odd look when their characters meet. Also, in the same episode, fellow ''Series/TheWestWing'' alum Richard Schiff guest stars (as [[ImplacableMan The Implacable]] [[NinjaPirateRobotZombie Rabbi Detective]]), and he and [=McCormack=] share a classic [[WalkAndTalk Sorkin Pedeconference]] through the halls of a hospital at the end of the episode.
* In ''Series/TheWestWing'', Martin Sheen offers William Devane the job of vice president. The last time they faced each other in the oval office was in the 1970's, in ''The Missiles of October'', when they played Robert and John F. Kennedy respectively. Both were doing Mayor Quimby accents back then, of course.
* The ''Series/{{Buffy the Vampire Slayer}}'' fifth season opener was "Buffy vs Dracula", billed as a battle of the titans. It was a little undercut by Dracula being played by Sarah Michelle Gellar's old flame from ''Series/AllMyChildren'', Rudolf Martin.
* On ''Series/ArrestedDevelopment'', David Cross's character goes to a therapist played by Creator/BobOdenkirk, his ''Mr. Show'' co-star.
** In another episode, entitled "Family Ties", Creator/JasonBateman's character meets a woman he thinks is his long-lost sister, but turns out to be prostitute. She's played by his actual sister, Justine Bateman, who's most famous for her role on ''Series/FamilyTies''.
* ''Series/{{Glee}}'': Creator/JonathanGroff's appearance as Rachel's beau Jesse St. James. He and Lea Michele (Rachel) were co-stars in the Broadway run of ''Theatre/SpringAwakening'' and best friends in real life. An ex of hers, John Lloyd Young, actually appeared in the third episode ("Acafellas") but their characters never interacted.
* ''Series/{{Becker}}'', starring Ted Danson, has featured guest appearances from his ''Series/{{Cheers}}'' co-stars Rhea Perlman, George Wendt and Kelsey Grammer, all of which are subtly lampshaded by means of role-reversal; Perlman plays a happy-go-lucky character to Danson's unhappy pessimist, Wendt plays a barman to Danson's character, and Grammer plays a recovering alcoholic against Danson's Harvard-graduate doctor. In Grammer's case, the two old friends also state that the last time they saw each other was in a bar in Boston.
* It happened a number of times in ''Series/NewsRadio''.
** In "Stupid Holiday Charity Talent Show", Dave's knife-throwing nemesis Throwdini is played by Dave Foley's former and future ''Series/TheKidsInTheHall'' colleague Kevin [=McDonald=].
** In "Goofy Ball", Bill's stalker is played by Phil Hartman's former ''Series/SaturdayNightLive'' colleague Creator/DennisMiller.
** Creator/JaneaneGarofalo and Creator/BobOdenkirk also made guest appearances; both worked with Andy Dick on ''Series/TheBenStillerShow''.
* Following the ending of ''Series/TheFreshPrinceOfBelAir'', Alfonso Ribeiro, who had played Carlton Banks, joined the cast of ''InTheHouse'' as Dr. Maxwell Stanton. In the finale of that show, Max's parents appear -- naturally, played by James Avery and Daphne Maxwell Reid, who had played Carlton's parents. Later a minister appears, played by Joseph Marcell, who had played Geoffrey Butler on ''The Fresh Prince Of Bel Air''. Topping off the gag, Max's father mistakenly gives the minister a drink order, then comments that he "looks like someone we used to know".
* In ''Series/{{Bottom}}'', Christopher Ryan -- who played the suave Mike alongside series writers-stars Adrian Edmondson and Rik Mayall in ''Series/TheYoungOnes'' -- occasionally shows up as Dave Hedgehog, the decidedly less suave friend of Edmondson's character Eddie.
* Creator/LindsayLohan, then-girlfriend to Creator/WilmerValderrama appeared on ''Series/That70sShow'' as a customer Fez later went out with in season 7.
** Chris Masterson guest-starred in a few episodes, and had at least one scene with Hyde, who is played by Chris' older brother Danny.
* Robert Carradine once guest-starred on an episode of 'Series/{{ER}}'' where he had a scene with Anthony Edwards detailing all the ways the hospital could be improved. Carradine and Edwards co-starred in RevengeOfTheNerds.
* ''Series/ICarly'' had an episode where Creator/MirandaCosgrove's real life best friend Haley Ramm play a childhood friend of hers that she hasn't seen in years in the episode "iReunite With Missy".
** Haley also appeared in ''YoursMineOurs'' as Miranda's character's step-sister.
* Florence Henderson and Robert Reed guest-starred in separate subplots on an episode of ''TheLoveBoat''. They meet at the buffet table, look as if they're about to recognize each other, then shake their heads dismissively and go their separate ways.
* In the ''Series/KenanAndKel'' episode "Poem Sweet Poem," Philip (one of Kenan and Kel's school friends) is played by their old pal [[Series/AllThat Josh Server]].
* Lisa Edelstein appeared in two episodes of ''Series/TheGoodWife'' early in season three, playing Celeste Serrano, a former colleague and former lover of Will Gardner, played by Josh Charles. Edelstein also appeared in two episodes of the show ''Series/SportsNight'', in which she played Roberta "Bobbie" Bernstein, a colleague and former lover of Dan Rydell, who was played by Josh Charles.
* ''Series/{{CSI NY}}'' had two. One of Gary Sinise's costars from the miniseries of ''Series/TheStand'' appeared in the season one episode "Night Mother", though they had only one brief scene together. More prominently was Mac's boss Sinclair played by Mykelti Williams, who starred alongside Gary as Bubba in ''Film/ForrestGump''.
** One episode of ''Series/{{CSI}}'' had Lea Thompson and Elisabeth Shue opposite one another. They'd previously started out in a series of Burger King advertisements in the early 80s, and also appeared together in ''Film/BackToTheFuturePartII'' and ''[[Film/BackToTheFuturePartIII Part III]]'', respectively appearing as Marty [=McFly=]'s mother Lorraine and girlfriend Jennifer ([[TheOtherDarrin with Elisabeth replacing Claudia Wells]]).
* ''Series/{{Dallas}}'' had Barbara Eden on for a few episodes as Lee Ann De La Vega. J.R. greeted her first appearance with "Haven't I seen you somewhere before?"
* On ''Series/{{NCIS}}'', after Abby discovers [[spoiler:that she was adopted]], she tracks down her half-brother. The actor who plays the brother is Pauley Perrette's real life ex-boyfriend turned close friend; Pauley urged her Twitter followers for months to lobby for him to be cast.
* ''Series/CougarTown'' got a lot of mileage from the regular and recurring cast of ''Series/{{Scrubs}}'', which was also created by Bill Lawrence and featured Christa Miller in a big role. This got confusing when [[CharacterOverlap Ted the Lawyer showed up]] in ''Cougar Town'', and hilarious when Ted stopped by the cul-de-sac and [[http://www.youtube.com/watch?v=pl6hIiecmxQ freaked out because everyone looked like someone he used to work with]].
-->[[CouchGag No,]] [[SelfDeprecation it's not just]] ''Series/{{Scrubs}}'' [[UsefulNotes/{{Florida}} in Florida]] [[WineIsClassy with a lot of wine]].
* ''Series/TheMiddle'' has done with Doris Roberts in a recurring role in its second season and Ray Romano in the third-season premiere. Both were, of course, castmates of star Patricia Heaton previously on ''Series/EverybodyLovesRaymond''.
* ''Series/{{Supernatural}}'': Paris Hilton guest-starred as a demon taking the form of herself in one episode. She had previously worked with series star Jared Padalecki in the remake ''Film/HouseOfWax2005'', and the episode includes a reference to the film.
* Music/MileyCyrus' RealLife godmother Music/DollyParton played the role of [[TheDanza Aunt Dolly]] on ''Series/HannahMontana''.
* Semi-subverted in ''Series/{{Community}}''. In the first season, Anthony Michael Hall guest-starred in a season one episode. Hall previously played the son of Chevy Chase (who plays Pierce on the show) in ''NationalLampoonsVacation'', although there's no real nod between the two within the episode.
* An episode of ''Series/BurnNotice'' has Maddy Westen, played by Sharon Gless, form a friendship with a character played by her ''Series/CagneyAndLacey'' co-star Tyne Daly.
* ''Series/ThatsSoRaven'' once had a guest appearance by Kirsten Storms, whose best friend Creator/RavenSymone played in the first ''Film/{{Zenon}}'' movie. Ironically, Storms portrayed an AlphaBitch in this episode.
* The first episode of ''Series/TheAmandaShow'' had guest appearances by Josh Server and Kenan Thompson.
* Fenella Woolgar, who played Creator/AgathaChristie in the ''Series/DoctorWho'' episode "The Unicorn and the Wasp", previously costarred with David Tennant in Creator/StephenFry's Evelyn Waugh adaptation ''Bright Young Things''.
* Wendy [=McLendon=]-Covey's old ''Series/{{Reno 911}}'' co-star Cedric Yarbrough guest-starred in her new show, ''Series/TheGoldbergs''. Oddly, the two didn't really have any interaction.
* ''Series/{{Psychoville}}'' stars Reece Shearsmith and Steve Pemberton of [[Series/TheLeagueOfGentlemen The League of Gentlemen]]. One episode features a guest appearance from their League colleague [[Creator/MarkGatiss Mark Gatiss]], thereby reuniting three of the four members of the troupe.
* On her show ''Series/ThatGirl'', Marlo Thomas bumped into a priest in a hallway, played by her father Danny Thomas:
-->'''Marlo''': "Excuse me, Father"\\
'''Danny''': "That's all right, my child."
* An episode of ''Series/HawaiiFive0'' had Daniel Dae Kim's ''Series/{{LOST}}'' co-star, Creator/JorgeGarcia, guest-star as a conspiracy theorist and Chin Ho's old buddy. The two even talked about an unpleasant camping trip that was [[ActorAllusion like being stranded on an island]].
* The ''Series/{{Arrowverse}}'' loves casting actors/actresses who previously appeared in the following shows;
** ''Series/{{Spartacus}} series'': Creator/ManuBennett (ComicBook/{{Deathstroke}}), Cynthia Addai-Robinson (Amanda Waller), Katrina Law (Nyssa Al'Gul), Nick E. Tarbay (Captain Boomerang), Liam [=McIntyre=] (Weather Wizard), and Todd Lascance.
** ''Series/PrisonBreak'': Creator/WentworthMiller (Captain Cold), Creator/DominicPurcell (Heat Wave), Creator/RobertKnepper (Clock King), Creator/PeterStormare (Count Vertigo II), and Chris Vance (Non).
** ''Series/{{The Tomorrow People 2013}}'': Creator/RobbieAmell (ComicBook/{{Firestorm}}) and Peyton List (Golden Glider).
** ''Series/{{Firefly}}'': Creator/SummerGlau (Isabel Rochev), Creator/SeanMaher (Shrapnel), Creator/MorenaBaccarin (Gideon), and Creator/JewelStaite (Dr. Bryce).
** ''Series/DoctorWho'': Creator/JohnBarrowman (Dark Archer), Creator/AlexKingston (Dinah Drake Lance), Colin Salmon (Walter Steele), and Creator/ArthurDarvill (Rip Hunter).
** Creator/JohnWesleyShipp, Amanda Pays and Creator/MarkHamill are a case of RemakeCameo. They were all cast members of [[Series/{{The Flash 1990}} the 90s Flash series]], with the latter two both having {{Role Reprisal}}s. Shipp, who played the titular hero in the [=90s=] series, plays [[CastingGag the titular hero's father in the current one.]]
** ''Series/{{Smash}}'': Andy Mientus (Pied Piper) and Creator/JesseLMartin (Det. Joe West), and Creator/JameySheridan (Robert Queen).
** ''Franchise/{{DCAU}}'': Creator/MarkHamill, Creator/ClancyBrown (Wade Eilling), Creator/MichaelJaiWhite (Bronze Tiger), Creator/MorenaBaccarin, and Creator/MichaelIronside (Lewis Snart).
** ''Series/{{Glee}}'': Creator/GrantGustin (Barry Allen), Creator/MelissaBenoist (Kara Zor-El), Victor Garber (Martin Stein), Blake Jenner (Adam Foster), Bex Taylor Klaus (Sin), Nolan Funk (Cooper Seldon), and Charlotte Ross (Donna Smoak).
** ''Series/{{Homeland}}'': Creator/DavidHarewood (J'onn J'onzz/Hank Henshaw), Creator/MelissaBenoist, Creator/MorenaBaccarin, Creator/JameySheridan, and Navid Neghban (Al-Owal).
** ''Series/TheVampireDiaries'': Creator/StephenAmell (Oliver Queen), Creator/RickCosnett (Eddie Thawne), Creator/MaleseJow (Linda Park), Janina Gavankar ([=McKenna=] Hall), and Todd Lascance.
** ''Series/TheWalkingDead'': Audrey Marie Anderson (Lyla Michaels-Diggle), Creator/EmilyKinney (Brie Larvan), Emma Bell (Emily Nocenti), and Creator/Creator/ChadLColeman.
** ''Series/{{Smallville}}'': Helen Slater (Eliza Danvers), Dean Cain (Jeremiah Danvers), and Creator/LauraVandervoort (Indigo).
* ''Series/OnceUponATime'' frequently cast alumnae (or current actors in a recurring role) from the following shows;
** ''Series/{{LOST}}'' alumnae have appeared the most. Those who appeared so far are; Creator/LanaParrilla, Creator/EmilieDeRavin (both series regulars), Creator/JorgeGarcia, Creator/AlanDale, Creator/RebeccaMader and Creator/ElizabethMitchell. Creator/NaveenAndrews was also a regular on [[Series/OnceUponATimeInWonderland the Spin-Off show]].
** From ''Series/TheWalkingDead'': Sonequa Martin-Green, Brighton Sharbino and Michael Raymond-James.
** Creator/SarahBolger and Colin O'Donoghue both appeared in ''Series/TheTudors''. In fact, the latter actually gave the former her first on-screen kiss.
* ''Series/TheWalkingDead'' loves casting ''Series/TheWire'' alumnae on the show. Those who appeared so far are Creator/ChadLColeman (Tyreese), Laurence Guillard, Jr. (Bob Stookey) and Seth Gilliam (Fr. Gabriel Stokes), all in major roles.
* Creator/TimAllen's latest sitcom ''Series/LastManStanding'' frequently has guest appearances from ''Series/HomeImprovement'' actors, always with a healthy does of self-awareness.
** Richard Karn (Al) as Bill MacKensie in "Attractive Architect," who mistakenly remembers Mike having three sons.
** Jonathan Taylor Thomas (Randy) has a recurring role John Baker, who Mike really likes and even notes that affectionately calling him "son" feels right.
** Patricia Richardson (Jill) as Helen Potts, a recently widowed neighbor who causes problems by working with loud power tools early in the morning and makes jokes about how poor a handy man her husband was.
** Blake Clark (Harry Turner) appeared as the owner of the music club where Eve performed during an open mic night. Unlike the others, there weren't any jokes regarding his previous role.
* ''Series/{{Grandfathered}}'' managed to get one for each of its leads in its [[ShortRunners lone season]]:
** In one episode, Jimmy (Creator/JohnStamos) reconnects with an old buddy played by ''Series/FullHouse'' costar Creator/BobSaget.
** In another, Creator/DrakeBell guest stars as a tech entrepreneur who Gerald and Vanessa are meeting about funding their app; he remarks that Gerald [[Series/DrakeAndJosh reminds him of his stepbrother.]]
* In Get Smart, Don Rickles, an old friend of Don Adams (Agent Smart) plays one of Smart's old army buddies.

[[folder:Professional Wrestling]]
* After being defeated by Son of Havok at Wrestling/LuchaUnderground, Sexy Star took him on with Wrestling/ChavoGuerreroJr. Havok, who some wrestling might have known better as Matt Cross, in turn teamed up with fellow Tough Enough contestant Wrestling/IvelisseVelez.[[/folder]]

* Creator/CatherineTate and Creator/DavidTennant of ''Series/DoctorWho'' fame were reunited for an onstage production of Creator/WilliamShakespeare's ''Theatre/MuchAdoAboutNothing''. They are both prominently featured in its advertising. (The two are also close friends in real life.)
* ''Theatre/{{Camelot}}'' was written and originally produced by much of the same team responsible for ''Theatre/MyFairLady'' (including director Moss Hart in the last Broadway show of his life). Not only did Creator/JulieAndrews have the starring role in both productions, but Robert Coote, who was Pickering in ''My Fair Lady'', returned as Sir Pellinore in ''Camelot''.

[[folder:Video Games]]
* ''VideoGame/MetalGearSolid4GunsOfThePatriots'': In the Japanese dub, Snake is voiced by Creator/AkioOhtsuka. When [[spoiler: the older Big Boss, who Snake was cloned from, appears at the very end of the game]], he was voiced by Akio's real-life father Creator/ChikaoOhtsuka.
* In the ''Franchise/MassEffect'' series Female Shepard and Ashley Williams are voiced by Creator/JenniferHale and Creator/KimberlyBrooks. The two have worked together as partners before... specifically band-mates Thorn and Luna from the various ''Franchise/ScoobyDoo'' movies and shows. This makes it all the more funnier if you have a female Shepard and always include Ashley in your squad and then turn the Hex Girls song on while playing.

[[folder:Web Comics]]
* ''Webcomic/{{Weregeek}}'' shows how not to let one's family and LARP spoil each other: [[http://www.weregeek.com/2012/10/01/ meet Alice and her kid]].

[[folder:Western Animation]]
* One of the best moments of ''WesternAnimation/SharkTale'' was when Robert De Niro said to Martin Scorsese, "We've worked together for a real long time."
* In the ''WesternAnimation/BatmanTheAnimatedSeries'' episode, "Beware the Grey Ghost", the Gray Ghost (a thinly veiled black and white Batman TV show copy) is voiced by Adam West.
** The Grey Ghost is also inspired by Radio/TheShadow, who himself inspired Batman.
* In ''WesternAnimation/BatmanTheBraveAndTheBold'' Blue Beetle's best friend Paco is played by Creator/JasonMarsden, who previously played Eric Matthews' best friend, er, [[TheDanza Jason Marsden]] on ''Series/BoyMeetsWorld'', and is Will Freidle's best friend in RealLife.
** This sort of thing happens a lot with these two.
* Also from ''WesternAnimation/BatmanTheBraveAndTheBold'', [[Franchise/DCAnimatedUniverse Kevin Conroy]], the voice of Batman from the 90s animated series, played the Phantom Stranger in "Chill of the Night!" alongside Creator/MarkHamill, who famously played the Joker in that series, as the Spectre. The episode also featured Creator/AdamWest as Thomas Wayne and Julie Newmar as Martha Wayne.
* The episode of ''WesternAnimation/TheBatman'' that introduced Robin featured Kevin Conroy (Batman from B:TAS) as Dick Grayson's father and Mark Hamill (Joker from same) as Tony Zucco.
** Also from the episode that introduced Robin with Mark Hamill was GreyDeLisle, who voiced Dick Grayson's mother. Hamill and [=DeLisle=] voiced father and daughter Ozai and Azula on ''WesternAnimation/AvatarTheLastAirbender''.
* When Pleakley's family comes to visit on ''WesternAnimation/LiloAndStitchTheSeries'', they are voiced by many of Kevin [=MacDonald=]'s former castmates from ''Series/TheKidsInTheHall''. The only Kid in the Hall who didn't voice a family member voiced a preacher in that episode.
* In the sequels to Disney's ''Cinderella'', Prince Charming is voiced by [[WesternAnimation/SpiderManTheAnimatedSeries Christopher Barnes]] and Cinderella herself is now voiced by Jennifer Hale, AKA The Black Cat from the same series.
** Also, during the run of said series, Robert Hays reprised his role of WesternAnimation/IronMan for [[CrossOver some team-ups]] with Spider-Man. Hays and Barnes previously appeared together on the ''Series/{{Starman}}'' TV series and both were reportedly thrilled with working together again.
* Creator/TaraStrong and Creator/CreeSummer have been friends since childhood, even growing up together, and these days do a lot of voice-over work together. In other words, if you hear one of them in a given series, you're likely to hear at least one of the other two in the same series at some point.
** They've done enough shows together that their [[WesternAnimation/DrawnTogether respective characters]] eventually parodied the infamous SweepsWeekLesbianKiss.
** A lot of cartoon voice actors (see RelationshipVoiceActor) do this with people like Tara and Cree, as well as Creator/GreyDeLisle, Creator/TomKenny, Creator/KevinMichaelRichardson, Rob Paulsen, Creator/CarlosAlazraqui, the list could go on.
* In ''WesternAnimation/TheSimpsons'', Sideshow Bob is played by [[Series/{{Frasier}} Kelsey Grammer]]. His brother and father are played by David Hyde Pierce and John Mahoney respectively, who played Frasier's brother and father.
* Creator/BrendaSong played a rival to Music/AshleyTisdale's Candace on ''WesternAnimation/PhineasAndFerb''.
** Thomas Sangster played a young boy with a PrecociousCrush on Olivia Olsen's character in ''LoveActually''--so when they were cast Ferb and Vanessa, Ferb's crush on Vanessa became a running gag.
* One episode of ''WesternAnimation/CliffordTheBigRedDog'' had T-Bone (voiced by Kel Mitchell) meeting an old friend, Hamburger (Played by Kenan Thompson). If you're old enough, you'd remember that both of them starred together in [[Series/KenanAndKel two]] [[Series/AllThat shows]] prior to breaking up due to creative differences.
* ''WesternAnimation/TheAvengersEarthsMightiestHeroes'': [[WesternAnimation/DannyPhantom David Kaufman]] showed up at the beginning of season 2 reprising his role of the [[Franchise/FantasticFour Human Torch]] from past Marvel video games. Regular series heroine the Wasp is voiced by Colleen O'Shaughnessey, who voiced Danny's sister Jazz Fenton. Reportedly the two were excited to be working together again.
* In ''WesternAnimation/AvatarTheLastAirbender'', Creator/GreyDeLisle voices Azula, and Creator/MarkHamill voices her father, Fire Lord Ozai. In a third-season episode of ''WesternAnimation/DannyPhantom'', the ghost of the week, Undergrowth, is voiced by Mark Hamill, and Sam Manson is voiced by Grey [=DeLisle=]. When Undergrowth takes control of Sam's mind, she even calls him "father".
* In ''WesternAnimation/TheMightyB'', Andy Richter voices Creator/AmyPoehler's little brother. On ''Series/LateNight with Creator/ConanOBrien'', Poehler played Richter's little sister in a few sketches in the late 90s.
* In ''WesternAnimation/StevenUniverse'', Greg Universe and his former manager, Marty, are voiced by Tom Scharpling and Jon Wurster of radio show-turned-podcast ''The Best Show''. Compounding the CastingGag is that despite the real-life duo being great friends and well-known comedy performers, Marty was such an utterly despicable black hole of a person (similar to awful characters Wurster used to play on WFMU, like the Gorch or Timmy von Trimble) and abused Greg so badly that Greg now considers him "dead to me", [[spoiler:even though he was indirectly responsible for Greg meeting Rose]].