Clint Howard
Ice Cream Man / Gregory Tudor
Olivia Hussey
Nurse Wharton
David Warner
Reverend Langley
Jan-Michael Vincent
Detective Gifford
Sandahl Bergman
Marion Cassera
David Naughton
Martin Cassera
Justin Isfeld
Johnny Spodak
Anndi McAfee
Heather Langley
JoJo Adams
Tuna Cassera
Mikey LeBeau
Small Paul
Steve Garvey
Mr. Spodak
Janet Wood
Mrs. Spodak
Andrea Evans
Wanda
Stephen Fiachi
Gus
Stephanie Champlin
Janet
Doug Llewelyn
Store Manager
Tom Reilly
Charley
Cole S. McKay
Ice Cream King
Zachary Benjamin
Roger Smith
Jessica Devlin
Mrs. Smith
E.E. Bell
Happy Doctor
Ryan Holihan
Photo Clerk
Ed Morgan
Crazy Doctor
Lee Majors II
Detective Maldwyn
Karl Makinen
Jacob Spodak
Keith Mills
Butcher
Matthew McCurley
Young Gregory
Kendall McCarthy
Police Officer
Jeanine Anderson
Mrs. Langley
Marla Frees
Gregory's Mother
Ken Hanes
Police Officer
Frank Roach
Park Janitor
Carly Adams
Little Girl
Roger Ferreira
Doctor in Psychiatric Institution (uncredited)
Roger Ferreira
Asylum Inmate in Straight Jacket (uncredited)