Zac Efron Troy Bolton Vanessa 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 Chris Warren Zeke Baylor Olesya Rulin Kelsi Nielsen Joey Miyashima Principal Dave Matsui Ryan Templeman Skater Dude #2 Irene Santiago Chem Teacher Leslie Wing Lucille Bolton Joyce Cohen Ms. Falstaff Anne Kathryn Parma Susan Charles Klapow Basketball Player Dancer Brad Tobler Basketball Player Dancer Allison Holker Cheerleader Dancer Britt Stewart Cheerleader Dancer Mollee Gray Brainiac Dancer Michelle Parker Braniac Dancer Thayne Jasperson Brainiac Dancer Shawn Carter Skaterdude Dancer Malinda Money Skaterdude Dancer Ryne Sanborn Jason Cross Kaycee Stroh Martha Cox Bayli Baker Cheerelader Dancer Drew Seeley Troy Bolton (singing voice) (uncredited) Joe Cappelletti Basketball Championship Announcer (uncredited) Chase Ramsey Jock (uncredited) Carleton Bluford Basketball Player Dancer