Sigourney Weaver

Ripley

Charles S. Dutton

Dillon

Charles Dance

Clemens

Paul McGann

Golic

Brian Glover

Andrews

Ralph Brown

Aaron

Danny Webb

Morse

Christopher John Fields

Rains

Holt McCallany

Junior

Lance Henriksen

Bishop II

Christopher Fairbank

Murphy

Carl Chase

Frank

Leon Herbert

Boggs

Vincenzo Nicoli

Jude

Pete Postlethwaite

David

Paul Brennen

Troy

Clive Mantle

William

Peter Guinness

Gregor

Deobia Oparei

Arthur

Phil Davis

Kevin

Niall Buggy

Eric

Hi Ching

Company Man

Danielle Edmond

Newt

Tom Woodruff Jr.

Lead Alien (uncredited)