Alien may refer to any of the following pages:
- Alien (film) - the 1979 science fiction horror film directed by Ridley Scott and starring Tom Skerritt, Sigourney Weaver, Veronica Cartwright, Harry Dean Stanton, John Hurt, Ian Holm and Yaphet Kotto.
- Aliens (film) - the 1986 science fiction action film directed by James Cameron and starring Sigourney Weaver, Carrie Henn, Michael Biehn, Lance Henriksen, William Hope, and Bill Paxton.
- Alien 3 - the 1992 science fiction horror film directed by David Fincher and starring Sigourney Weaver, Charles S. Dutton, Charles Dance, Brian Glover, Ralph Brown, Paul McGann, Danny Webb, Pete Postlethwaite, and Lance Henriksen.
- Alien Resurrection - the 1997 science fiction film directed by Jean-Pierre Jeunet and starring Sigourney Weaver, Dan Hedaya, J. E. Freeman, Brad Dourif, Carolyn Campbell, David St. James, Raymond Cruz, Michael Wincott, Kim Flowers, Gary Dourdan, Ron Perlman, Dominique Pinon, and Winona Ryder.
Alien vs. Predator (franchise)
- Alien vs. Predator (film) - the 2004 science fiction horror film directed by Paul W. S. Anderson and starring Sanaa Lathan, Lance Henriksen, Raoul Bova, Ewen Bremner, Tommy Flanagan, Joseph Rye, Agathe de La Boulaye, Carsten Norgaard, Liz May Brice, and Sam Troughton.
- Aliens vs. Predator: Requiem - the 2007 science fiction film directed by the Brothers Strause and starring Steven Pasquale, Reiko Aylesworth, John Ortiz, Johnny Lewis, Ariel Gade, Kristen Hager, Sam Trammell, and Robert Joy.
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