Dennis Mitchell
George Wilson
Martha Wilson
Jack Bratcher
Henry Mitchell
Alice Mitchell
Joey
Margaret
Gina
Mrs. Walsh-Mellman
David Bratcher
Mr. Peeves (as Richard M. Dumont)
Santa / Bob The Angel
Neighbor (as Ray 'Guido' Cocomello)
Mr. Souse
Stuffy Woman
Police Officer Wong
Georgie
Wilbur Newman
Future Boy
Old Dennis
Futuristic Boy (uncredited)
Officer 2 (uncredited)