 | Sigourney Weaver Ripley |
 | Carrie Henn Newt |
 | Michael Biehn Corporal Hicks |
 | Paul Reiser Burke |
 | Lance Henriksen Bishop |
 | Bill Paxton Private Hudson |
 | William Hope Lieutenant Gorman |
 | Jenette Goldstein Private Vasquez |
 | Al Matthews Sergeant Apone |
 | Mark Rolston Private Drake |
 | Ricco Ross Private Frost |
 | Colette Hiller Corporal Ferro |
 | Daniel Kash Private Spunkmeyer |
 | Cynthia Dale Scott Corporal Dietrich |
 | Tip Tipping Private Crowe |
 | Trevor Steedman Private Wierzbowski |
 | Paul Maxwell Van Leuwen |
 | Valerie Colgan ECA Rep |
 | Alan Polonsky Insurance Man |
 | Alibe Parsons Med Tech |
| Blain Fairman Doctor |
| Barbara Coles Cocooned Woman |
| Carl Toop Alien Warrior |
| John Lees Power Loader Operator |
 | Holly De Jong Newt's Mother |
| Christopher Henn Newt's Brother |
 | Jay Benedict Newt's Father |
 | William Armstrong Lydecker |
 | Mac McDonald Simpson |
 | Eddie Powell Alien Warrior (uncredited) |
 | Jill Goldston Worker in Corridor (Special Edition) (uncredited) |
 | Elizabeth Inglis Amanda Ripley-Mclaren (uncredited) |
 | Stuart Milligan Salvage Team Leader (uncredited) |
| Bob Sherman Salvage Team Leader (voice) (uncredited) |
 | Chris Webb Alien Warrior (uncredited) |
 | Tom Woodruff Jr. Salvager (uncredited) |
 | Alec Gillis Alien (uncredited) |
| Directing | |
| James Cameron | Director |
Production | |
| Gale Anne Hurd | Producer |
Sound | |
| James Horner | Original Music Composer |
Camera | |
| Adrian Biddle | Director of Photography |
Editing | |
| Ray Lovejoy | Editor |
Art | |
| Peter Lamont | Production Design |
| Ken Court | Art Direction |
| Bert Davey | Art Direction |
| Fred Hole | Art Direction |
| Michael Lamont | Art Direction |
| Crispian Sallis | Set Decoration |
Costume & Make-Up | |
| Emma Porteous | Costume Design |
Sound | |
| Michael Clifford | Music Editor |
Crew | |
| Norman Baillie | Special Effects |
| Paul Weston | Stunt Coordinator |
| Elanor Bertram | Stunts |
Writing | |
| James Cameron | Screenplay |
Crew | |
| Brian Johnson | Special Effects |
Editing | |
| Simon Harris | Assistant Editor |
Costume & Make-Up | |
| Tiny Nicholls | Costume Supervisor |
Production | |
| Jane Feinberg | Casting |
| Mike Fenton | Casting |
| Mary Selway | Casting |
| Judy Taylor | Casting |
Sound | |
| Don Sharpe | Supervising Sound Editor |
Visual Effects | |
| Richard Hewitt | Visual Effects Supervisor |
| Dennis Skotak | Visual Effects Supervisor |
| Robert Skotak | Visual Effects Supervisor |
Camera | |
| Shaun O'Dell | Camera Operator |
| David Worley | Camera Operator |
| Bob Penn | Still Photographer |
Lighting | |
| Jack Thetford | Gaffer |
Sound | |
| Archie Ludski | Dialogue Editor |
| Roy Charman | Sound Recordist |
Art | |
| Bert Hearn | Property Master |
| Terry Ackland-Snow | Supervising Art Director |
Crew | |
| Chris Webb | Stunts |
Sound | |
| Robin Clarke | Music Editor |
Writing | |
| Ronald Shusett | Characters |
| Dan O'Bannon | Characters |
| David Giler | Story |
| Walter Hill | Story |
| James Cameron | Story |
Production | |
| Walter Hill | Executive Producer |
| David Giler | Executive Producer |
| Gordon Carroll | Executive Producer |
Art | |
| Vic Simpson | Construction Manager |
Costume & Make-Up | |
| Elaine Bowerbank | Key Hair Stylist |
Production | |
| Mo Coppitters | Unit Production Manager |
| Hugh Harlow | Production Supervisor |
| Gil Whelan | Unit Production Manager |
Directing | |
| Derek Cracknell | First Assistant Director |
| Melvin Lind | Second Assistant Director |
| Stan Winston | Second Unit Director |
Art | |
| Ron Cobb | Conceptual Design |
| Syd Mead | Concept Artist |
Sound | |
| Rocky Phelan | Foley Editor |
Crew | |
| Simon Crane | Stunts |
| Sue Crosland | Stunts |
| Steve Dent | Stunts |
| Stuart Fell | Stunts |
| Louise Head | Stunt Double |
| Jazzer Jeyes | Stunts |
| Sean McCabe | Stunts |
| Eddie Powell | Stunts |
| Kiran Shah | Stunt Double |
| Stuart St. Paul | Stunts |
| Malcolm Weaver | Stunts |
| Bill Weston | Stunts |
| Jason White | Stunts |
| Clive Curtis | Stunt Double |
Editing | |
| Peter Boita | Associate Editor |
| Phil Sanderson | First Assistant Editor |
Sound | |
| Greig McRitchie | Orchestrator |
Directing | |
| Diana Dill | Script Supervisor |
Crew | |
| Geoff Freeman | Unit Publicist |
Visual Effects | |
| H. R. Giger | Creature Design |
Crew | |
| Paul Tucker | Production Controller |
Production | |
| Joyce Turner | Production Coordinator |
Costume & Make-Up | |
| Peter Robb-King | Makeup Supervisor |
Crew | |
| Peter Russell | Visual Effects Art Director |
Art | |
| Steven Woodcock | Set Decoration |
