Alien vs. Predator (stylized on-screen as AVP: Alien vs. Predator) is a 2004 science fiction action horror film written and directed by Paul W. S. Anderson, and starring Sanaa Lathan, Raoul Bova, Lance Henriksen, Ewen Bremner, Colin Salmon, and Tommy Flanagan. It is the first film installment of the Alien vs. Predator franchise, the fifth film in the Alien franchise and third film of the Predator franchise, adapting a crossover bringing together the eponymous creatures of the Alien and Predator series, a concept which originated in a 1989 comic book written by Randy Stradley and Chris Warner. Anderson wrote the story, with the creators of the Alien franchise, Dan O'Bannon and Ronald Shusett receiving additional story credit due to the incorporation of elements from the Alien series, and Anderson and Shane Salerno adapted the story into a screenplay. Their writing was influenced by Aztec mythology, the comic book series, and the writings of Erich von Däniken. In the film, scientists are caught in the crossfire of an ancient battle between Aliens and Predators as they attempt to escape a bygone pyramid.

Alien vs. Predator was theatrically released on 13 August 2004. The film received generally negative reviews from critics, but grossed $177.4 million worldwide against a production budget of $60–70 million. A direct sequel, Aliens vs. Predator: Requiem, was released in 2007.