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 Writer, Screenwriter Ronald Shusett Writer, Executive Producer David Giler Producer Gordon Carroll Producer Ivor Powell Associate Producer Jerry Goldsmith Original Music Derek Vanlint Cinematographer Terry Rawlings Film Editing Peter Weatherley Film Editing Michael Seymour Production Design Roger Christian Art Director Leslie Dilley Art Director Ian Whittaker Set Decoration John Mollo Costume Design Pay Hay Makeup Artist Tommy Manderson Makeup Designer Sarah Monzani Hair Stylist Walter Hill Producer