Battlefield Earth: A Saga of the Year 3000 is a 2000 American film adaptation of the novel Battlefield Earth by L. Ron Hubbard. Directed by Roger Christian, the film stars John Travolta, Forest Whitaker, and Barry Pepper. The film depicts an Earth that has been under the rule of the alien Psychlos for 1,000 years and tells the story of the rebellion that develops when the Psychlos attempt to use the surviving humans as gold miners.

Travolta, a long-time Scientologist, had sought for many years to make a film of the novel by Hubbard, the founder of Scientology. He was unable to obtain funding from any major studio due to concerns about the film's script, prospects, and connections with Scientology. The project was eventually taken on by an independent production company, Franchise Pictures, which specialized in rescuing stars' stalled pet projects. Travolta signed on as a co-producer and contributed millions of dollars of his own money to the production, which was largely funded by a German film distribution company. Franchise Pictures was later sued by its investors and was bankrupted after it emerged that it had fraudulently overstated the film's budget by $31 million.

Battlefield Earth was released on May 12, 2000. The film was a major commercial failure and critical flop and has been widely dismissed as one of the worst films ever made. Reviewers universally panned the film, criticizing virtually every aspect of the production. Audiences were reported to have ridiculed early screenings and stayed away from the film after its opening weekend. This resulted in Battlefield Earth failing to recoup its costs. Travolta originally envisioned the film as the first of two adapted from the book, as the screenplay only covered the first half of the novel. The film's poor box office performance meant that the planned sequel would not be made.