Zac Efron ... Troy Bolton

Vanessa Anne Hudgens ... Gabriella Montez

Ashley Tisdale ... Sharpay Evans

Lucas Grabeel ... Ryan Evans
Alyson Reed ... Ms. Darbus

Corbin Bleu ... Chad Danforth

Monique Coleman ... Taylor McKessie

Olesya Rulin ... Kelsi Nielsen

Chris Warren Jr. ... Zeke Baylor

Bart Johnson ... Coach Jack Bolton

Ryne Sanborn ... Jason Cross
Socorro Herrera ... Mrs. Montez
Joey Miyashima ... Principal Matsui
Dutch Whitlock ... Skater Dude #1
Ryan Templeman ... Skater Dude #2

Irene Santiago ... Chem Teacher (as Irene Santiago-Baron)

Leslie Wing ... Mrs. Bolton (as Leslie Pomeroy)

Joyce Cohen ... Librarian

Kaycee Stroh ... Martha Cox
Brett Yoder ... M.C.
Sarah K. Aezer ... Girl #1
Amanda Garrett ... Girl #2
Anne Kathryn Parma ... Susan

Nick Whitaker ... Alan
Falon Grace ... Cyndra
Sami Roe ... Weird Kid #1
Melissa Hildebrant ... Weird Kid #2
Charles Klapow ... Basketball Player Dancer
Brad Tobler ... Basketball Player Dancer
David Huff ... Basketball Player Dancer
Carlton Bluford ... Basketball Player Dancer (as Carleton W. Bluford)
Jared Murillo ... Basketball Player Dancer
Roger Malaga ... Basketball Player Dancer
Todd Michael Schwartzman ... Basketball Player Dancer (as Todd Schwartzman)
Da' Jon Lang ... Basketball Player Dancer (as Da'Jon Lang)
Allison Holker ... Cheerleader Dancer
Tina Pituckul ... Cheerleader Dancer
Raquel Goodsell ... Cheerleader Dancer
Britt Stewart ... Cheerleader Dancer
Kelli Baker ... Cheerleader Dancer
Bayli Baker ... Cheerleader Dancer
Jessie Tan ... Cheerleader Dancer
Breanna Phillips ... Cheerleader Dancer

Skyler Holman ... Brainiac Dancer
Mollee Gray ... Brainiac Dancer
Michelle Parker ... Braniac Dancer
Andrew Winston ... Braniac Dancer
Afton Delgrosso ... Brainiac Dancer

Falisha Fehoko ... Brainiac Dancer
Thane Jasperson ... Brainiac Dancer (as Thayne Jasperson)

Shawn Carter ... Skater Dude Dancer
Eldon Johnson ... Skater Dude Dancer
Josh Murillo ... Skater Dude Dancer
Malinda Money ... Skater Dude Dancer
Sabra Johnson ... Skater Dude Dancer