Troy Bolton
Gabriella Montez (as Vanessa Anne Hudgens)
Sharpay Evans
Ryan Evans
Chad Danforth
Taylor McKessie
Coach Jack Bolton
Ms. Darbus
Zeke Baylor (as Chris Warren Jr.)
Kelsi Nielsen
Jason Cross
Mrs. Montez
Principal Matsui
Skater Dude #1
Skater Dude #2
Chem Teacher (as Irene Santiago-Baron)
Mrs. Bolton (as Leslie Pomeroy)
Librarian
Martha Cox
M.C.
Girl #1
Girl #2
Susan
Alan
Cyndra
Weird Kid #1
Weird Kid #2
Basketball Player Dancer
Basketball Player Dancer (as Carleton W. Bluford)
Basketball Player Dancer (as Todd Schwartzman)
Basketball Player Dancer (as Da'Jon Lang)
Cheerleader Dancer
Brainiac Dancer
Braniac Dancer
Skater Dude Dancer
Student (uncredited)
Basketball Championship Announcer (uncredited)
Basketball Player Dancer (uncredited)
Cheerleader Dancer (uncredited)
Chapstick (uncredited)
Cafe dancer (uncredited)
Jock (uncredited)
Referee (uncredited)
Dancer (uncredited)
Troy Bolton (singing voice) (uncredited)