Anthony Michael Hall

Gary

Kelly LeBrock

Lisa

Ilan Mitchell-Smith

Wyatt

Bill Paxton

Chet

Suzanne Snyder

Deb

Judie Aronson

Hilly

Robert Downey Jr.

Ian

Robert Rusler

Max

Vernon Wells

Lord General

Britt Leach

Al

Barbara Lang

Lucy

Michael Berryman

Mutant Biker

Ivor Barry

Henry

John Kapelos

Kandy Bar Owner

Chino 'Fats' Williams

Bar Patron

Jill Whitlow

Perfume Salesgirl

Wallace Langham

The Weenies

Mikul Robins

The Weenies

Renee Props

The Weenies

Mary Steelsmith

Girl in Bathroom

Kym Malin

Girl Playing Piano

Jennifer Balgobin

Biker Girl

Prince Hughes

Party Guest

Rick LeFevour

Policeman

Joe Gieb

Blob Operator

Kevin Thompson

Blob Operator

Steve James

Guy at Table (uncredited)