Zac Efron - Troy Bolton
Vanessa Anne Hudgens -  Gabriella Montez
Ashley Tisdale -  Sharpay Evans
Lucas Grabeel -  Ryan Evans
Corbin Bleu -  Chad Danforth
Monique Coleman -  Taylor McKessie
Bart Johnson -  Coach Jack Bolton
Alyson Reed - Ms. Darbus
Olesya Rulin -  Kelsi Nielsen
Chris Warren Jr. -  Zeke Baylor
Ryne Sanborn -  Jason Cross
Socorro Herrera - Mrs. Montez
Joey Miyashima - Principal Matsui
Irene Santiago -  Chem Teacher 
Leslie Wing -  Mrs. Bolton 
JoyceCohen -  Librarian
Kaycee Stroh -  Martha Cox
BrettYoder -  M.C.
Anne Kathryn Parma -  Susan
Nick Whitaker -  Alan
Falon Grace -  Cyndra