Zelig is a 1983 American mockumentary film written and directed by Woody Allen, and starring Allen and Mia Farrow. Allen plays Zelig, a curiously nondescript enigma who is discovered for his remarkable ability to transform himself to resemble anyone he's near.

The film was shot almost entirely in the style of 1920s-style black and white film newsreels, which are seamlessly interwoven with stock footage from the era, including cleverly-filmed re-enactments of historical events. Narration is likewise largely in newsreel style. While being mostly set in the 1920s, the storyline occasionally shifts to present day (1983) interviews, shot in color.