Kurt Russell

MacReady

Wilford Brimley

Blair

T.K. Carter

Nauls

David Clennon

Palmer

Keith David

Childs

Richard Dysart

Dr. Copper

Charles Hallahan

Norris

Peter Maloney

Bennings

Richard Masur

Clark

Donald Moffat

Garry

Joel Polis

Fuchs

Thomas G. Waites

Windows

Norbert Weisser

Norwegian

Larry Franco

Norwegian Passenger with Rifle

Nate Irwin

Helicopter Pilot

William Zeman

Pilot

John Carpenter

Norwegian (video footage) (uncredited)

Adrienne Barbeau

Computer (voice) (uncredited)