American Pie is a film series consisting of four sex comedy films. American Pie, the first film in the series, was released by Universal Pictures in 1999. The film became a worldwide pop culture phenomenon and gained a cult following among young people. Following American Pie, the second and third films in the series, American Pie 2 (2001) and American Wedding (2003), were released; the fourth, American Reunion, was released in 2012. A spin-off film series entitled American Pie Presents consists of five direct-to-video films that were released from 2005 to 2020.

American Pie is a 1999 American coming-of-age teen sex comedy film directed and co-produced by Paul Weitz and written by Adam Herz. It is the first film in the American Pie theatrical series and stars an ensemble cast that includes Jason Biggs, Chris Klein, Alyson Hannigan, Natasha Lyonne, Thomas Ian Nicholas, Tara Reid, Mena Suvari, Eddie Kaye Thomas, Seann William Scott, Eugene Levy, Shannon Elizabeth, and Jennifer Coolidge. The film's story centers on a group of five classmates who attend the fictional East Great Falls High School. The youths make a pact to lose their virginity before their high school graduation.