Party Monster is a 2003 American biographical crime drama film written and directed by Fenton Bailey and Randy Barbato, who are also producers along with Jon Marcus and Christine Vachon. It stars Macaulay Culkin as the drug-addled "king of the Club Kids". The film tells the story of the rise and fall of the infamous New York City party promoter Michael Alig. This was Macaulay Culkin's first film in nearly nine years since his starring role in the 1994 film Richie Rich.

The film is based on Disco Bloodbath, the memoir of James St. James which details his friendship with Alig, that later fell apart as Alig's drug addiction worsened, and ended after he murdered Andre "Angel" Melendez and went to prison. Bailey and Barbato had previously directed a 1998 documentary on the murder, also called Party Monster: The Shockumentary, from which certain elements were used for this film.