Kurt Russell
Steve Stronghold / The Commander
Michael Angarano
Will Stronghold
Kelly Preston
Josie Stronghold / Jetstream
Danielle Panabaker
Layla Williams
Mary Elizabeth Winstead
Gwen Grayson / Royal Pain
Bruce Campbell
Coach Boomer
Steven Strait
Warren Peace
Dave Foley
Mr. Boy
Kevin McDonald
Mr. Medulla
Nicholas Braun
Zachary "Zach" Braun / Zack Attack
Kelly Vitz
Magenta
Dee Jay Daniels
Ethan
Lynda Carter
Principal Powers
Kevin Heffernan
Ron Wilson, Bus Driver
Cloris Leachman
Nurse Spex
Jim Rash
Mr. Grayson / Stitches
Will Harris
Speed
Jake Sandvig
Lash
Loren Berman
Little Larry
Malika Haqq
Penny
Khadijah Haqq McCray
Penny
Dustin Ingram
Carbon Copy Kid
Christopher Wynne
News Anchor
Amy Brown
Twin
Kimmy Brown
Evil Twin
Lucille Soong
Cook
Zachry Rogers
Young Commander
Tom Kenny
Mr. Timmerman
Jill Talley
Mrs. Timmerman
Patrick Warburton
Royal Pain (voice)
Vakisha Coleman
Student Sidekick (uncredited)
Sean Gordon
Penny's Date (uncredited)
Hans Hernke
Laser-Vision Boy (uncredited)
Jason Maxim
Funky Prom Boy (uncredited)