54 is a 1998 American drama film written and directed by Mark Christopher. Starring Ryan Phillippe, Salma Hayek, Neve Campbell, and Mike Myers, the film focuses on the rise and fall of Studio 54, a famous nightclub in New York City during the late 1970s and early 1980s.

Prior to its release in the United States on August 28, 1998, by Miramax Films, the film was extensively reshot and recut; it ultimately opened to poor critical reaction and box office. In 2008, a bootleg version of the director's cut was screened at Outfest, leading to interest for its release. In 2015, Christopher and Miramax premiered a new edit of the film at the 65th Berlin International Film Festival, with 45 minutes of original material restored and 30 minutes of studio re-shoots removed.