Arnold Schwarzenegger as Douglas Quaid / Hauser

Rachel Ticotin as Melina

Sharon Stone as Lori Quaid

Ronny Cox as Vilos Cohaagen

Michael Ironside as Richter

Marshall Bell as George / Kuato

Mel Johnson Jr. as Benny

Michael Champion as Helm

Roy Brocksmith as Dr. Edgemar

Ray Baker as Bob McClane

Rosemary Dunsmore as Dr. Lull

David Knell as Ernie

Alexia Robinson as Tiffany

Dean Norris as Tony

Mark Carlton as Bartender

Debbie Lee Carrington as Thumbelina

Lycia Naff as Mary

Robert Costanzo as Harry

Michael LaGuardia as Stevens

Priscilla Allen as Fat Lady

Ken Strausbaugh as Immigration Officer

Marc Alaimo as Everett

Michael Gregory as Rebel Lieutenant

Ken Gildin as Hotel Clerk

Mickey Jones as Burly Miner

Ellen Gollas as Martian Wife

Parker Whitman as Martian Husband

Gloria Dorson as Woman in Phone Booth

Erika Carlsson as Miss Lonelyhearts

Benny Corral as Punk Cabbie

Bob Tzudiker as Doctor

Erik Cord as Lab Assistant

Frank Kopyc as Technician

Chuck Sloan as Scientist

Dave Nicolson as Scientist

Paula McClure as Newscaster

Rebecca Ruth as Reporter

Milt Tarver as Commercial Announcer

Roger Cudney as Agent

Monica Steuer as Mutant Mother

Sasha Rionda as Mutant Child

Linda Howell as Tennis Pro

Robert Picardo as Johnnycab (voice)

Kamala Lopez as Additional Voices (voice)

Morgan Lofting as Additional Voices (voice)

Patti Attar as Additional Voices (voice)

Bob Bergen as Additional Voices (voice)

Joe Unger as Additional Voices (voice)

Karlyn Michelson as Additional Voices (voice)

Joel Kramer as Harry's Henchman (uncredited)

Andy Armstrong as Richter's Henchman (uncredited)

Graeme Crowther as Richter's Subway Agent (uncredited)

Thomas Ebert as Subway Rider (uncredited)

Frank Allen Forbes as Vestron Soldier (uncredited)

Allan Graf as Harry's Henchman (uncredited)

Peter Kent as Richter's Subway Agent (uncredited)

Steven Lambert as Man Standing Behind Fat Lady (uncredited)

Billy D. Lucas as Richter's Subway Agent (uncredited)

Bennie Moore as Richter's Subway Agent (uncredited)

Terry Richards as Henchman at Cementfactory (uncredited)