* DawsonCasting: Many of the actors were actually in their early 20s, though when the films initially started, most of the characters were played by people close to their actual age. Taylor's actress, Monique Coleman, was 26 at the time of the first film.
** Averted by Austin Butler in the spin-off film, who was nineteen and playing a college freshman.
*** Likewise [[GoodLuckCharlie Bradley Steven Perry]] as Sharpay's rival.
* FakeAmerican: Oleysa Rulin (Kelsi) is originally from Russia.
** Though she was raised in Texas and Utah and does not have to fake an accent so this trope is debatable.
* HeyItsThatGuy: As it says right above, Bradley Steven Perry in ''Sharpay's Fabulous Adventure''
* HeyItsThatVoice: The Japanese dub use a LOT of famous voice actors as the main cast:
** Troy and Gabriella are [[Creator/MasakazuMorita Ichigo Kurosaki]] and [[Creator/FumikoOrikasa Rukia Kuchiki]] from ''Manga/{{Bleach}}''. Gabriella is also [[SuitePrettyCure Kanade Minamino]] and [[Series/MiraiSentaiTimeranger Time Robota]].
** Sharpay Evans [[RyokoNagata is]] [[KiddyGrade Eclair]], [[MermaidMelodyPichiPichiPitch Noel]], and [[PhineasAndFerb Candace]].
*** Of course, Sharpay is still Candace in the English versions too.
** Ryan Evans [[Creator/JunFukuyama is]] [[CodeGeass Lelouch Lamperouge]] and [[VisualNovel/SuperDanganRonpa2 Teruteru Hanamura]]
** Chad Danforth [[Creator/TomokazuSeki is]] [[Anime/MobileFighterGGundam Domon Kasshu]].
** Taylor [[Creator/MaayaSakamoto is]] [[VisionOfEscaflowne Hitomi Kanzaki]], [[OuranHighSchoolHostClub Haruhi Fujioka]] and [[SoulEater Crona]].
** Zeke Baylor [[Creator/DaisukeKishio is]] [[SchoolRumble Kyosuke Imadori]] and [[VisualNovel/SuperDanganRonpa2 Fuyuhiko Kuzuryuu]]
** Kelsie Nielsen [[AtsukoEnomoto is]] [[KareKano Yukino Miyazawa]] and [[FutariWaPrettyCureSplashStar Mai Mishou]].
** Jack Bolton [[Creator/NaoyaUchida is]] [[{{Naruto}} Madara Uchiha]].
** Jimmie Zara [[Creator/TakahiroMizushima is]] [[CodeGeass Rolo]].
*** Is there a clip of this somewhere? Or even a link to the whole Japanese dub of this movie? That sounds kinda awesome.
*** Observe the wonder of [[LadyOfWar Rukia]] singing ''[[http://youtu.be/w0hZ2hU7Mdc When There Was Me and You]]''. There's also ''[[http://youtu.be/g4-oR48IJEU All In This Together]]''; slight {{Engrish}}, but hey.
*** In Germany, Troy is [[OnePiece Monkey D. Luffy]].
**** In English, FPS fans will lose their minds when they realize that misanthropic [[VideoGame/TeamFortress2 Sniper]] is teaching high school kids.
* IncestuousCasting: One character remarks that if Sharpay could find a way to play both Romeo and Juliet, Ryan would be out of a job, suggesting that the two have played romantic partners in the past.
* PlayingAgainstType: Oddly, Ashley Tisdale as Sharpay - her previous Disney role was Maddie in TheSuiteLifeOfZackAndCody, [[HairOfGoldHeartOfGold a completely]] [[NiceGirl different role.]]
* RomanceOnTheSet: Between Zac Efron and Vanessa Hudgens, who were together for over five years. They confessed to liking each other during the first film and got together during the second. (Although they hid it for as long as they could to avoid media attention). Kenny Ortega admitted that he'd noticed their chemistry since the beginning, and deliberately paired them during auditions.
* StarMakingRole: For Zac Efron & Vanessa Hudgens.