Ridley Scott Director Tom Skerritt Captain A.J. Dallas Actor Sigourney Weaver Warrant Officer Lt. Ellen L. Ripley Actor John Hurt Engineer G.W. Kane Actor Veronica Cartwright Navigator J.M. Lambert Actor Harry Dean Stanton Engineering Technician S.E. Brett Actor Ian Holm Science Officer Ash Actor Yaphet Kotto Chief Engineer J.T. Parker Actor Helen Horton Mother Actor Dan O'Bannon Screenwriter Ronald Shusett Screenwriter, Executive Producer David Giler Producer Gordon Carroll Producer Walter Hill Producer Jerry Goldsmith Original Music Derek Vanlint Cinematographer Terry Rawlings Film Editor Peter Weatherley Film Editor Michael Seymour Production Design Roger Christian Art Director Leslie Dilley Art Director