 | Tom Skerritt als Dallas |
 | Sigourney Weaver als Ripley |
 | Veronica Cartwright als Lambert |
 | Harry Dean Stanton als Brett |
 | John Hurt als Kane |
 | Ian Holm als Ash |
 | Yaphet Kotto als Parker |
 | Bolaji Badejo als Alien |
 | Helen Horton als Mother (voice) |
| Ridley Scott | Director |
| Gordon Carroll | Producer |
| David Giler | Producer |
| Walter Hill | Producer |
| Ronald Shusett | Executive Producer |
| Jerry Goldsmith | Original Music Composer |
| Derek Vanlint | Director of Photography |
| Terry Rawlings | Editor |
| Peter Weatherley | Editor |
| Michael Seymour | Production Design |
| Roger Christian | Art Direction |
| Leslie Dilley | Art Direction |
| Ian Whittaker | Set Decoration |
| John Mollo | Costume Design |
| Brian Johnson | Special Effects |
| Mary Goldberg | Casting |
| Mary Selway | Casting |
| Jonathan Amberston | Assistant Art Director |
| Max Bell | Dolby Consultant |
| Roy Scammell | Stunt Coordinator |
| Bob Penn | Still Photographer |
| Jean Giraud | Conceptual Design |
| Ben Burtt | Sound Designer |
| H. R. Giger | Creature Design |
| Benjamín Fernández | Assistant Art Director |
| Ron Cobb | Concept Artist |
| Chris Foss | Concept Artist |
| Bill Welch | Construction Manager |
| Ray Evans | Gaffer |
| Jimmy Walters | Key Grip |
| Sarah Monzani | Hairdresser |
| Pat Hay | Makeup Artist |
| Tommie Manderson | Makeup Supervisor |
| Paul Ibbetson | First Assistant Director |
| Garth Thomas | Production Manager |
| Brian Johnson | Special Effects Supervisor |
| Guy Hudson | Special Effects Technician |
| Phil Knowles | Special Effects Technician |
| Dennis Lowe | Special Effects Technician |
| Roger Nichols | Special Effects Technician |
| Neil Swan | Special Effects Technician |
| David H. Watkins | Special Effects Technician |
| Dennis Ayling | VFX Director of Photography |
| Kay Fenton | Continuity |
| Derrick Leather | Production Sound Mixer |
| Jim Shields | Sound Editor |
| Bill Rowe | Sound Re-Recording Mixer |
| Raymond Becket | Assistant Director |
| Eddie Butler | Modeling |
| George Gunning | Carpenter |
| Patti Rodgers | Modeling |
| Eddie Powell | Stunts |
| Tiny Nicholls | Wardrobe Supervisor |
| Robert Hathaway | Music Editor |
| Lionel Newman | Conductor |
| Brian Doyle | Unit Publicist |
| Bill Finch | Production Accountant |
| Ivor Powell | Associate Producer |
| Bryan Tilling | Dialogue Editor |
| Dave Jordan | Property Master |
| Graham Churchyard | Costume Assistant |
| Carlo Rambaldi | Visual Effects |
| Nick Allder | Special Effects Supervisor |
| Peter Voysey | Modelling Supervisor |
| Dan O'Bannon | Story |
| Ronald Shusett | Story |
| Dan O'Bannon | Screenplay |
