* DawsonCasting:
** Jason Earles, who plays Jackson, was a real-life example of VagueAge, his year of birth variably being reported as either 1977, 1985 or 1988, until it was finally confirmed to be 1977, making him almost 29 years old when the show premiered. {{Averted}} with the rest of the young characters, who are played by real teenagers.
** Of special note: In the episode which [[ShipTease teased]] a Lilly/Jackson pairing, Emily Osment was 16 and Jason Earles was 31, or almost twice her age.
** Season 4's recurring guest character Siena, implied to be around Jackson's age, is played by 26-year old Tammin Sursok.
*** Actually her age was never mentioned. There's no reason she can't be 26.
* HeyItsThatGuy:
** Mamaw is played by [[MamasFamily Mama]].
** Lilly is portrayed by Emily Osment, the lesser-known - and of late, arguably better-known - sister of [[TheSixthSense Haley]] [[ForrestGump Joel]] [[Franchise/KingdomHearts Osment]]. Some people remember her as Gerti Giggles from ''SpyKids''.
** [[http://en.wikipedia.org/wiki/Beau_Billingslea Beau Billingslea]] plays the mayor of Miley's Tennessee hometown, in TheMovie. Yes, ''[[Anime/CowboyBebop that]]'' Beau Billingslea.
** [[Series/StarTrekVoyager Tim]] [[ICarly Russ]] as the doctor charged with saving Hannah's singing voice.
** [[TheNanny Charles Shaughnessy]] as the Simon Cowell parody in "Judge Me Tender".
** Wasn't Thor one of the guys present during [[Film/{{Transformers}} the landing of the Autobots?]]
** [[MamasFamily Vicki Lawrence]] as Jackson and Miley's grandmother.
** David Koechner, who plays Todd Packer from ''TheOffice'', as Uncle Earl.
** Also from ''TheOffice'', Melora Hardin as Lorelai, Robbie's love interest in TheMovie.
** [[SonnyWithAChance Tiffany Thornton]] as the aforementioned Brainless Bodacious Becky.
** [[ThePractice Camryn Manheim]] as Margo, Mikayla's obnoxious, loud-mouthed pitbull of a manager.
** Troy Evans, best-known for playing Frank on Series/{{ER}} as Jerry, a junkyard worker.
** "Saint" Sarah was Lulu in ''ThePacifier''.
** [[StElsewhere Ed Begley, Jr.]] as Sarah's dad.
** Alan from ''TwoAndAHalfMen'' as Lilly's dad.
*** And Jake as Siena's annoying cousin
** SelenaGomez as Mikayla, Hannah's rival.
** [[DancingWithTheStars Carrie Ann Inaba]] as Tina, Hannah's choreographer.
** {{Fred}}.
** [[{{Goodfellas}} Ray Liotta]] as Principal Luger.
** [[{{Dodgeball}} Christine Taylor]] as Lori the [[SchoolNurse school nurse]].
** Robert Costanzo as Al Blaine, the owner of the arcade where Lilly works.
** [[Series/GeneralHospital Gildart Jackson]] as Quinn, Hannah's record producer.
** [[PrettyLittleLiars Jenna Marshall]] as Jackson's girlfriend
** [[Series/{{Community}} Ali]][[MadMen son]] [[Creator/AlisonBrie Brie]] as an aspiring hairstylist who sabotages Jackson and Rico's hair
** [[ANTFarm China Anne McClain and Sierra McCormick]] as two of the audience members that asked Hannah in "Welcome To The Bungle".
** In the concert film, if you look hard enough, you might just spot [[TheVampireDiaries Caroline Forbes]] as one of the backup singers.
*** To a (somewhat) lesser degree, Miley's friend, dancer/singer/choreographer Mandy Jiroux, as of March 2013 an emerging dance-pop/EDM artist under the name of MJX, worked as a dancer for Miley/Hannah tours and appearances for a number of years. By 2009 she appeared as part of YouTube web series ''TheMileyAndMandyShow'' for a year, and for a period was a member of GirlGroup BG5 (later rebooted as YLA without Mandy) before striking out on her own.
* HeyItsThatVoice:
** [[SonicTheHedgehog Jason Griffith]] as a radio announcer.
** In the Japanese dub: Hannah Montana is [[Manga/HayateTheCombatButler Hayate Ayasaki]]. Incidentally, her [[Creator/RyokoShiraishi voice actress]] dubs Music/MileyCyrus in Japanese in almost every other movie or TV series she appears in.
* OldShame: [[http://content.usatoday.com/communities/entertainment/post/2011/02/billy-ray-cyrus-on-hannah-montana-that-damn-show-destroyed-my-family/1 Judging from his comments to GQ magazine]], Billy Ray Cyrus has blamed the show for destroying his family.
** He retracted the statement not long after.
* WhatCouldHaveBeen: The BigDamnMovie was due to be scored by AlanSilvestri, but because of schedules it ended up being done by JohnDebney (although "Butterfly Fly Away," written by Silvestri and Glen Ballard, remains in the movie). Ironically, [[RecycledSoundtrack part of Silvestri's score for]] ''TheMexican'' is tracked into the movie (in the scene where the British reporter eats peppers).
** The show began as a ''ThatsSoRaven'' spinoff called ''Better Days'', about a child actor masquerading as a schoolgirl, and it was to star [[CampRock Alyson Stoner]].
** The lead character was to be named Zoe Stewart, then Chloe Stewart as they felt "Zoe" sounded too much like the lead in ''Zoey101''. They settled on "Miley Stewart" so 13-going-on-14-year-old MileyCyrus wouldn't have to remember so many names.
** At one point the series was under the working title "Alexis Texas". Whether or not the change had to due to a porn actress of the same name who also made her first appearance in 2006 likely remains a mystery (but given Disney Channel sensibilities, it's a safe bet).