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
Thomas Lennon Ned Gold
Tiya Sircar Samantha
Allison Miller Scarlett (Teen)
Lorna Scott Secretary
Melissa Ordway Lauren
Diana Maria Riva Judge
Margaret Cho Mrs. Dell
Shelby Rabara Cheerleader (1989)
Rachele Brooke Smith Hammer Dancer
Jim Gaffigan Coach Murphy
Hunter Parrish Stan
Will Schaub Referee
Toby Emmerich Executive Producer
Larry Poindexter Dean
Tommy Dewey Roger
Adam Shankman Producer
Gregory Sporleder Ohio Scout
Jason Filardi Writer
Vanessa Lee Chester Cheerleader
Linda Miller Female Janitor
Lindsay Taylor Cheerleader (1989)
Katrina Norman Cheerleader (1989)
Rolfe Kent Original Music Composer
Alina Andrei Stunts
Steve Kelso Stunt Driver, Stunt Double
Padraic McKinley Editor
Steve Gehrke Script Supervisor
Dan Bell Stunt Double
Jeanine Jackson Scarlet's Lawyer
Ray Siegle Stunt Driver
Michael Owen Stunt Driver
Geo Corvera Stunts
Jesse Heiman Mascot
Mandy Kowalski Stunts
Bruce Tanis Sound Effects Editor
Leonard Wu Kid (Office)
Dennis Scott Stunts
Dan Brown Stunt Double
Christopher Scott Hammer Dancer
Chuck Zlotnick Still Photographer
Adam Gregory Dom
Lisa Beach Casting
Sarah Katzman Casting
Zack Duhame Stunt Driver
Loren Lester Mike's Lawyer
Bubba Lewis Dorky Kid (Ned's Party)
Jeremy Fry Stunt Driver
Burr Steers Director
Jennifer Gibgot Producer
Ellis Williams Bailiff
Ed Ackerman School Cop
Steve Tartalia Stunt Double
Keith Oney Guy in Crowd (uncredited)
David Jones Visual Effects Supervisor
Erik Holmberg Executive In Charge Of Production
Michael Keller Sound Re-Recording Mixer
Tom Elliott Stunts
Jimmy Hart Stunts
Tyler Steelman Ned Gold (Teen)
Stuart F. Wilson Utility Stunts
Marie Larkin Key Hair Stylist