Sigourney Weaver as Ripley

Carrie Henn as Newt

Michael Biehn as Corporal Hicks

Paul Reiser as Burke

Lance Henriksen as Bishop

Bill Paxton as Private Hudson

William Hope as Lieutenant Gorman

Jenette Goldstein as Private Vasquez

Al Matthews as Sergeant Apone

Mark Rolston as Private Drake

Ricco Ross as Private Frost

Colette Hiller as Corporal Ferro

Daniel Kash as Private Spunkmeyer

Cynthia Dale Scott as Corporal Dietrich

Tip Tipping as Private Crowe

Trevor Steedman as Private Wierzbowski

Paul Maxwell as Van Leuwen

Valerie Colgan as ECA Rep

Alan Polonsky as Insurance Man

Alibe Parsons as Med Tech

Blain Fairman as Doctor

Barbara Coles as Cocooned Woman

Carl Toop as Alien Warrior

John Lees as Power Loader Operator

Holly De Jong as Newt's Mother

Christopher Henn as Newt's Brother

Jay Benedict as Newt's Father

William Armstrong as Lydecker

Mac McDonald as Simpson

Eddie Powell as Alien Warrior (uncredited)

Jill Goldston as Worker in Corridor (Special Edition) (uncredited)

Elizabeth Inglis as Amanda Ripley-Mclaren (uncredited)

Stuart Milligan as Salvage Team Leader (uncredited)

Bob Sherman as Salvage Team Leader (voice) (uncredited)

Chris Webb as Alien Warrior (uncredited)

Tom Woodruff Jr. as Salvager (uncredited)

Alec Gillis as Alien (uncredited)