Ben Crandall
Wolfgang Müller
Steve Jackson
Steve Jackson's Gang
Lori Swenson
Nasty Kid at School
Darren Woods
Mrs. Müller
Ludwig Müller
Mr. Müller
Science Teacher
Girl in Classroom
Darren's Teacher
Starkiller / Wak / Wak and Neek's Father
Starkiller's Girlfriend
Starkiller's Girlfriend's Father
Couple at Drive-In
Snack Bar Girl
Gordon Miller
Charlie Drake
Neek
Wak and Neek's Father (voice)
(voice)
(voice) (as Joanie Gerber)
(voice) (as Robert Holt)
Snack Bar Patron (uncredited)
Mrs. Crandall (uncredited)
'Starkiller' Wilhelm Scream (archive sound) (uncredited)