A 1985 American comedy-drama film written, produced, and directed by John Hughes. It stars Emilio Estevez, Anthony Michael Hall, Judd Nelson, Molly Ringwald and Ally Sheedy as teenagers from different high school cliques who spend a Saturday in detention with their authoritarian assistant principal who is Paul Gleason.

The film premiered in Los Angeles on February 7, 1985. Universal Pictures released it in cinemas in the United States on February 15, 1985. It received critical acclaim and earned $51.5 million on a $1 million budget. Critics consider it to be one of Hughes’s most memorable and recognizable works. The media referred to the film’s five main actors as members of a group called the “Brat Pack”.

In 2016, the film was selected for preservation in the United States National Film Registry by the Library of Congress as being “culturally, historically, or aesthetically significant”. The film was digitally remastered and was re-screened throughout 430 theaters in celebration of its 30th anniversary in 2015.