The Lost Boys is a 1987 American comedy horror film directed by Joel Schumacher, produced by Harvey Bernhard, and with the screenplay written by Jeffrey Boam, Janice Fischer, and James Jeremias, from a story by Fischer and Jeremias. The film's ensemble cast includes Corey Feldman, Jami Gertz, Corey Haim, Edward Herrmann, Barnard Hughes, Jason Patric, Kiefer Sutherland, Jamison Newlander, and Dianne Wiest.

The film follows two teenaged brothers who move with their divorced mother to the fictional town of Santa Carla, California, only to discover that the town is a haven for vampires. The title is a reference to the Lost Boys in J. M. Barrie's stories about Peter Pan and Neverland, who like vampires, never grow up. Most of the film was shot in Santa Cruz, California.

The Lost Boys was released by Warner Bros. Pictures on July 31, 1987, and was a critical and commercial success, grossing over $32 million against a production budget of $8.5 million. It has since then been described as a cult classic. The success of the film 21 years after its release spawned a franchise with two low-budget sequels (Lost Boys: The Tribe and Lost Boys: The Thirst), and two comic-book series.