About Last Night (stylized as "About Last Night...") is a 1986 American romantic comedy-drama film directed by Edward Zwick, and starring Rob Lowe and Demi Moore as Chicago yuppies Danny Martin and Debbie Sullivan, who enter a committed relationship for the first time. Along with featuring James Belushi as Danny's friend and colleague Bernie Litko, the film also marks the screen debuts of Elizabeth Perkins and Catherine Keener. The screenplay by Tim Kazurinsky and Denise DeClue is based on the 1974 David Mamet play Sexual Perversity in Chicago. The film was both critically and commercially successful, and was remade with a predominantly Black cast in 2014.

Plot

In Chicago, Daniel "Dan" Martin and Bernard "Bernie" Litko, two friends and colleagues in their twenties, discuss their sexual escapades. Later, their recreational softball team, sponsored by local bar Mother's, plays against a local advertising agency in Grant Park and wins. Attending this game with her girlfriends is Deborah "Debbie" Sullivan, who works at the advertising company and is having an affair with her boss, Steve Carlson.