The Untouchables is a 1987 American crime film directed by Brian De Palma, produced by Art Linson, and written by David Mamet. It stars Kevin Costner, Charles Martin Smith, Andy García, Robert De Niro and Sean Connery. Set in Chicago in 1930, the film follows Eliot Ness (Costner) as he forms the Untouchables team to bring Al Capone (De Niro) to justice during Prohibition. This is the third film for which De Niro and De Palma collaborated, after Greetings (De Niro's debut in a major role) and Hi, Mom!.

The screenplay is loosely based on Ness and Oscar Fraley's 1957 book The Untouchables and the real-life events it was based on, though most of its plot is fictionalized. The Grammy Award–winning score was composed by Ennio Morricone and features period music by Duke Ellington.

The Untouchables premiered on June 2, 1987, in New York City, and went into general release on June 3, 1987, in the United States. The film grossed $106.2 million worldwide and received generally positive reviews from critics. It was nominated for four Academy Awards; Connery won the Academy Award for Best Supporting Actor, as well as the Golden Globe Award for Best Supporting Actor – Motion Picture.