Zac Efron Mike O'Donnell
Matthew Perry Mike O'Donnell (Adult)
Leslie Mann Scarlett O'Donnell
Melora Hardin Principal Jane Masterson
Brian Doyle-Murray Janitor
Josie Loren Nicole
Sterling Knight Alex O'Donnell
Nicole Sullivan Naomi
Michelle Trachtenberg Maggie O'Donnell
Kat Graham Jamie
Collette Wolfe Wendy
Tiya Sircar Samantha
Thomas Lennon Ned Gold
Allison Miller Scarlett (Teen)
Lorna Scott Secretary
Hunter Parrish Stan
Margaret Cho Mrs. Dell
Rachele Brooke Smith Hammer Dancer
Shelby Rabara Cheerleader (1989)
Jim Gaffigan Coach Murphy
Will Schaub Referee
Diana Maria Riva Judge
Larry Poindexter Dean
Tommy Dewey Roger
Toby Emmerich Executive Producer
Steve Gehrke Script Supervisor
Alina Andrei Stunts
Adam Shankman Producer
Gregory Sporleder Ohio Scout
Jesse Heiman Mascot
Jason Filardi Writer
Vanessa Lee Chester Cheerleader
Linda Miller Female Janitor
Melissa Ordway Lauren
Christopher Scott Hammer Dancer
Lindsay Taylor Cheerleader (1989)
Katrina Norman Cheerleader (1989)
Stuart F. Wilson Utility Stunts
Geo Corvera Stunts
Lisa Beach Casting
Steve Kelso Stunt Driver, Stunt Double
Leonard Wu Kid (Office)
Dennis Scott Stunts
Dan Bell Stunt Double
Padraic McKinley Editor
Jeanine Jackson Scarlet's Lawyer
Ray Siegle Stunt Driver
Rolfe Kent Original Music Composer
Perry Robertson Supervising Sound Editor
Adam Gregory Dom
Sarah Katzman Casting
Dan Brown Stunt Double
Loren Lester Mike's Lawyer
Bubba Lewis Dorky Kid (Ned's Party)
Hugh Waddell Supervising Sound Editor
Zack Duhame Stunt Driver
Melissa Yonkey Hair Department Head
Tom Elliott Stunts
Matt Berberi Stunts
Peter Dress Second Second Assistant Director
Burr Steers Director
Ellis Williams Bailiff
Michael Owen Stunt Driver
Ed Ackerman School Cop
John Ross Sound Re-Recording Mixer
Steve Tartalia Stunt Double
Erik Holmberg Executive In Charge Of Production
Mark Chadwick Stunts
Keith Oney Guy in Crowd (uncredited)
David Jones Visual Effects Supervisor
Mandy Kowalski Stunts
Jimmy Hart Stunts