Marathon Man is a 1976 American thriller film directed by John Schlesinger. It was adapted by William Goldman from his 1974 novel of the same title and stars Dustin Hoffman, Laurence Olivier, Roy Scheider, William Devane and Marthe Keller. In the film, "Babe" Levy, a graduate student, becomes embroiled in a plot by Nazi war criminal Christian Szell to retrieve ill-gotten diamonds from a safe deposit box owned by Szell's dead brother. Babe becomes unwittingly involved due to his brother Doc's dealings with Szell.

The film was a critical and box-office success. Olivier received an Oscar nomination for Best Supporting Actor for his role as Szell, the film's antagonist.