Alien premiered May 25, 1979, as the opening night of the fourth Seattle International Film Festival, presented in 70mm at midnight. It received a wide release on June 22 and was released September 6 in the United Kingdom. It was met withmixed reviews on release but was a box-office success, winning the Academy Award for Best Visual Effects, three Saturn Awards (Best Science Fiction Film, Best Direction for Scott, and Best Supporting Actress for Cartwright), and a Hugo Award for Best DramaticPresentation. In 2002, Alien was deemed "culturally, historically, or aesthetically significant" by the Library of Congress and was selected for preservation in the United States National Film Registry. In 2008, it was ranked by the American Film Instituteas the seventh-best film in the science-fiction genre, and as the 33rd-greatest film of all time by Empire.
The success of Alien spawned a media franchise of films, novels, comic books, video games, and toys. It also launched Weaver's acting career, providing her with her first lead role. The story of her character's encounters with the Aliencreatures became the thematic and narrative core of the sequels Aliens (1986), Alien 3 (1992), and Alien Resurrection (1997). A crossover with the Predator franchise produced the Alien vs. Predator films: Alien vs. Predator (2004) and Aliens vs. Predator:Requiem (2007). A prequel series includes Prometheus (2012) and Alien: Covenant (2017), both directed by Scott.
Alien had both an immediate and long-term impact on the science fiction and horror genres.