Indecent Proposal is a 1993 American erotic drama film directed by Adrian Lyne and written by Amy Holden Jones. It is based on the 1988 novel by Jack Engelhard, in which a couple's marriage is disrupted by a stranger's offer of a million dollars for the wife to spend the night with him. It stars Robert Redford, Demi Moore, and Woody Harrelson.

The film received a mostly negative response from critics for the contrivances and implausibilities of its story. It also sparked controversy, with feminists arguing the film's premise promotes prostitution and the treatment of women as property. Despite this, the film was a box office success and grossed nearly $267 million worldwide on a $38 million budget, becoming the sixth highest-grossing film of 1993.