Patrick Stewart
— Rafe Bentley
Vincent Kartheiser
— Oswald 'Ozzie' Paxton
Brenda Fricker
— Principal Claire Maloney
Bradley Whitford
— Miles Lawrence
Matt Craven
— Jake Paxton
Annabelle Gurwitch
— Helen Randall Paxton
Jon Abrahams
— Richard 'K-Dog'
Katie Stuart
— Melissa Randall
Michael MacRae
— Foster Deroy
Callum Keith Rennie
— Ollie
Earl Pastko
— Captain Jankel
Jason Schombing
— Marvin
Michael David Simms
— Colonel Duke
David-Paul Grove
— Ferret
Akiko Morison
— Janet
Teryl Rothery
— Ms. Saunders
Vanessa Morley
— Gabby
Douglas Arthurs
— Happy Boy #1
Philip Granger
— Happy Boy #3
Andrew Kavadas
— Happy Boy #4
Lauro David Chartrand-DelValle
— Happy Boy #5
Charles Andre
— Happy Boy #6
Alan van Sprang
— Happy Boy #7
Rob Smith
— Happy Boy #13
Nino Caratozzolo
— Happy Boy #18
Bruce Pinard
— Happy Boy Guard
April Telek
— Sexy Girl
Steve Makaj
— SWAT Captain
Jay Brazeau
— Eliot
Douglas Newell
— Science Teacher