Zac Efron as Troy Bolton

Vanessa Hudgens as Gabriella Montez

Ashley Tisdale as Sharpay Evans

Lucas Grabeel as Ryan Evans

Corbin Bleu as Chad Danforth

Monique Coleman as Taylor McKessie

Olesya Rulin as Kelsi Nielson

Chris Warren as Zeke Baylor

Ryne Sanborn as Jason Cross

Kaycee Stroh as Martha Cox

Bart Johnson as Coach Jack Bolton

Alyson Reed as Ms. Darbus

Matt Prokop as Jimmie "Rocket Man" Zara

Justin Martin as Donny Dion

Jemma McKenzie-Brown as Tiara Gold

Leslie Wing as Lucille Bolton

Socorro Herrera as Lisa Montez

David Reivers as Charlie Danforth

Yolanda Stange as Mrs. Danforth

Robert Curtis Brown as Vance Evans

Jessica Tuck as Darby Evans

Joey Miyashima as Principal Dave Matsui

Stan Ellsworth as Mr. Riley

Dave Fox as Coach Kellogg

Jeremy Banks as Stagehand

Todd Snyder as Mr. Juilliard

Tara Starling as Ms. Juilliard

Manly "Little Pickles" Ortega as Boi Evans

Bayli Baker as Principal Dancer

Shawn Carter as Principal Dancer

Katie Cockrell as Principal Dancer

Max Ehrich as Principal Dancer

Italo Elgueta as Principal Dancer

Christina Glur as Principal Dancer

Jaimie Goodwin as Principal Dancer

Mollee Gray as Principal Dancer

Charles Klapow as Principal Dancer

Kimberly Klapow as Principal Dancer

Nick Lanzisera as Principal Dancer

Roger Malaga as Principal Dancer

Doug Penikas as Principal Dancer

Jameson Perry as Principal Dancer

Tia Robinson as Principal Dancer

Haylee Roderick as Principal Dancer

Britt Stewart as Principal Dancer

Jason Williams as Principal Dancer

Nikola Clark as Featured Dancer - Now or Never

Audra Griffis as Featured Dancer - Now or Never

Megan Honore as Featured Dancer - Now or Never

Cara Horibe as Featured Dancer - Now or Never

David Huff as Featured Dancer - Now or Never

Melissa Magleby as Featured Dancer - Now or Never

Allysa Shorte as Featured Dancer - Now or Never

Mercedes Bailey as Featured Dancer - I Want it All

Lisa Benson as Featured Dancer - I Want it All

Christina Bluth as Featured Dancer - I Want it All

Nacole Brown as Featured Dancer - I Want it All

Erica L. Bryce as Featured Dancer - I Want it All

Taylor Cate as Featured Dancer - I Want it All

Stacey Clark as Featured Dancer - I Want it All

Lacey Derrick as Featured Dancer - I Want it All

Mallauri Esquibel as Featured Dancer - I Want it All

Alexander Farnsworth as Featured Dancer - I Want it All

Hayley Folsom as Featured Dancer - I Want it All

Raquel Goodsell as Featured Dancer - I Want it All

Daysha Hannemann as Featured Dancer - I Want it All

Adair Hensley as Featured Dancer - I Want it All

Bailee Hunsaker as Featured Dancer - I Want it All

Kelene Johnson as Featured Dancer - I Want it All

Kaelee Jones as Featured Dancer - I Want it All

Tiffany Mallari as Featured Dancer - I Want it All

Nina Miller as Featured Dancer - I Want it All

Seneca Miner as Featured Dancer - I Want it All

Taylour Paige as Featured Dancer - I Want it All

Amber Snow as Featured Dancer - I Want it All

Jessica Snowden as Featured Dancer - I Want it All

Kelsey Peterson Tanner as Featured Dancer - I Want it All

Tyler Welling as Featured Dancer - I Want it All

Chelsea Williams as Featured Dancer - I Want it All

Tadd Gadduang as Featured Dancer - The Boys Are Back

Kaleb Henderson as Featured Dancer - The Boys Are Back

Skyler Johnson as Featured Dancer - The Boys Are Back

Miguel Olague as Featured Dancer - The Boys Are Back

Chris Owens as Featured Dancer - The Boys Are Back

Tui-Niua Tuita as Featured Dancer - The Boys Are Back

Josh Unice as Featured Dancer - The Boys Are Back

Zack Wilson as Featured Dancer - The Boys Are Back

Katie Allred as Featured Dancer - High School Musical

Kelli Baker as Featured Dancer - High School Musical

Chaz Bodily as Featured Dancer - High School Musical

Averie DelGrosso as Featured Dancer - High School Musical

D.J. Guthrie as Featured Dancer - High School Musical

Casey Harward as Featured Dancer - High School Musical

Jaremy Hill as Featured Dancer - High School Musical

Eldon Johnson as Featured Dancer - High School Musical

Noelle Menard as Featured Dancer - High School Musical

Jen Osorio as Featured Dancer - High School Musical

Junar Pasco as Featured Dancer - High School Musical

Brandon Perry as Featured Dancer - High School Musical

Sydney T. Sorenson as Featured Dancer - High School Musical

Jessie Thacker as Featured Dancer - High School Musical

Hefa Leone Tuita as Featured Dancer - High School Musical

Lisa Whittaker as Featured Dancer - High School Musical

Veronica Yeager as Featured Dancer - High School Musical

Jared Murillo as Student (uncredited)