Natural Born Killers is a 1994 American crime film directed by Oliver Stone and starring Woody Harrelson, Juliette Lewis, Robert Downey Jr., Tom Sizemore, and Tommy Lee Jones. The film tells the story of two victims of traumatic childhoods who become lovers and mass murderers, and are irresponsibly glorified by the mass media.

The film is based on an original screenplay by Quentin Tarantino that was heavily revised by Stone, writer David Veloz, and associate producer Richard Rutowski. Tarantino received a story credit though he subsequently disowned the film. Jane Hamsher, Don Murphy, and Clayton Townsend produced the film, with Arnon Milchan, Thom Mount, and Stone as executive producers.

The film was released on August 26, 1994 in the United States, and screened at the Venice Film Festival on August 29, 1994. It was a box office success, grossing $110 million against a production budget of $34 million, but received a mixed critical reception. Some critics praised the plot, acting, humor, and combination of action and romance, while others found the film overly violent and graphic. Notorious for its violent content and inspiring "copycat" crimes, the film was named the eighth most controversial film in history by Entertainment Weekly in 2006.