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

Ann Coyle
Carmen

Suzy J. Kellems
Gymnast

John Kapelos
Kandy Bar Owner

Fred D. Scott
Bar Patron

Vince Townsend Jr.
Bar Patron

Chino 'Fats' Williams
Bar Patron

Jill Whitlow
Perfume Salesgirl

Theodocia Goodrich
Lingerie Saleswoman

Wallace Langham
The Weenies

Johnny Timko
The Weenies

Mikul Robins
The Weenies

Darren Harris
The Weenies

Renee Props
The Weenies

Michael Cramer
The Weenies

D'Mitch Davis
Bartender

Mary Steelsmith
Girl in Bathroom

Robin Frohman
Girl in Bathroom

Alison Carole Lowe
Girl in Upside Down Bathroom

Kym Malin
Girl Playing Piano

Jennifer Balgobin
Biker Girl

Jeff Jensen
Metal Face

Prince Hughes
Party Guest

Rick LeFevour
Policeman

Rock A. Walker
Policeman

Joe Gieb
Blob Operator

Kevin Thompson
Blob Operator

Doug MacHugh
Wyatt's Father

Pamela Gordon
Wyatt's Mother

James Huffman
Young Kid at Party (uncredited)

Steve James
Guy at Table (uncredited)

Michael K. Washko
Mall Shopper (uncredited)

Todd Hoffman
The Weenies