Saturday Night Fever is a 1977 American musical drama film directed by John Badham. It stars John Travolta as Tony Manero, a working-class young man who spends his weekends dancing and drinking at a local Brooklyn discothèque; Karen Lynn Gorney as Stephanie Mangano, his dance partner and eventual confidante; and Donna Pescow as Annette, Tony's former dance partner and would-be girlfriend. While in the disco, Tony is the champion dancer. His circle of friends and weekend dancing help him to cope with the harsh realities of his life: a dead-end job, clashes with his unsupportive and squabbling parents, racial tensions in the local community, and his general restlessness.

The story is based upon a 1976 New York magazine article by British writer Nik Cohn, "Tribal Rites of the New Saturday Night"; in the mid-1990s, Cohn acknowledged that he fabricated the article.[6] A newcomer to the United States and a stranger to the disco lifestyle, Cohn was unable to make any sense of the subculture he had been assigned to write about; instead, the character who became Tony Manero was based on an English mod acquaintance of Cohn.[6]

A huge commercial success, the film significantly helped to popularize disco music around the world and made Travolta, already well known from his role on TV's Welcome Back, Kotter, a household name. The Saturday Night Fever soundtrack, featuring disco songs by the Bee Gees, is one of the best-selling soundtracks of all time.[7] The film showcased aspects of the music, the dancing, and the subculture surrounding the disco era: symphony-orchestrated melodies; haute couture styles of clothing; pre-AIDS sexual promiscuity; and graceful choreography. The sequel Staying Alive (1983) also starred John Travolta and was directed by Sylvester Stallone, but received less positive reception. In 2010, Saturday Night Fever was deemed "culturally, historically, or aesthetically significant" by the Library of Congress and selected for preservation in the National Film Registry.

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