Alien

Alien is a culturally influential 1979 science-fiction horror film, directed by Ridley Scott and starring Sigourney Weaver. The film's title refers to the main antagonist, a highly aggressive, unfamiliar extraterrestrial life-form.

Alien garnered both critical acclaim and box-office success, spawning a Hollywood media franchise of literature, video games, merchandise, and three official sequels. The film effectively launched actress Sigourney Weaver's career. By featuring a strong heroine, Alien also proved unconventional (by Hollywood standards) for the action genre. While the Alien itself emerged as a popular aspect of the film, the story of Ellen Ripley became the thematic thread that ran through the series.