Marcus Klemp
— John 'Spacy' Callahan
Elijah James Shepard
— Gary Finch (as Elijah Shepard)
Mary Beth Hurt
— Mother
Tom Bower
— Mr. Speck
Clem Tucker Jr.
— Teats Bower
Patrick LaBrecque
— Tony Kemler
Jake Busey
— Richard Halverson
Michael Hyland
— Davey Rydell
Robert Breuler
— Mr. Kibby
Mary Forcade
— Mrs. Speck
Benjamin Salisbury
— Young Spacy
William Francis McGuire
— Father