Dana Delany

Margaret Rosenblatt (voice)

Jesse Head

Duncan Rosenblatt (voice)

Dante Basco

Kenny Rogers (voice)

Grey DeLisle

Ms. Dreakford (voice)

Reed Diamond

Barnes (voice)

Billy Evans

Steve (voice)

Josh Keaton

Troy (voice)

Jameson Moss

Big Rob (voice)

Kevin Michael Richardson

Belloc (voice)

Nicole Sullivan

Dr. Pytel (voice)

Tom Tartamella

Whitey (voice)

Tia Texada

Isabel (voice)

Gary Anthony Williams

Principal Dave / Troy's Dad (voice)

Amy Davidson

Jenna (voice)

Frank Welker

Dragon 1 (voice, uncredited)