Näitlejad

• Sigourney Weaver — Lt. Ellen Louise Ripley
• Michael Biehn — Cpl. Dwayne Hicks
• Carrie Henn — Newt
• Paul Reiser — Carter J. Burke
• Lance Henriksen — Lance Bishop
• Bill Paxton — Pvt. William L. Hudson
• William Hope — Lt. Scott Gorman
• Jenette Goldstein — Pvt. Jenette Vasquez
• Al Matthews — Sgt. Al Apone
• Mark Rolston — Pvt. Mark Drake
• Ricco Ross — Pvt. Ricco Frost
• Colette Hiller — Corporal Ferro
• Daniel Kash — Pvt. Daniel Spunkmeyer
• Cynthia Scott — Corporal Dietrich (as Cynthia Scott)
• Tip Tipping — Pvt. Tim Crowe
• Trevor Steedman — Pvt. Trevor "Ski" Wierzbowski
• Paul Maxwell — Van Leuwen
• Valerie Colgan — ECA Rep
• Alan Polonsky — Insurance Man
• Alibe Parsons — Med Tech
• Blain Fairman — Doctor