10 Things I Hate About You is a 1999 American teen romantic comedy film directed by Gil Junger in his film directorial debut and starring Julia Stiles, Heath Ledger, Joseph Gordon-Levitt, and Larisa Oleynik. The screenplay by Karen McCullah Lutz and Kirsten Smith is a modernization of William Shakespeare's comedy The Taming of the Shrew, retold in a late-1990s American high school setting. The film follows new student Cameron James (Gordon-Levitt) who is smitten with Bianca Stratford (Oleynik) and attempts to get bad boy Patrick Verona (Ledger) to date her antisocial sister Kat (Stiles) in order to get around her father's strict rules on dating. Named after a poem Kat writes about her romance with Patrick, the film was mostly shot in the Seattle metropolitan area, with many scenes filmed at Stadium High School in Tacoma, Washington.

Released on March 31, 1999, 10 Things I Hate About You grossed $53.7 million and received generally positive reviews from critics. It provided breakthrough roles for Stiles, Ledger, and Gordon-Levitt, all of whom were nominated for various teen-oriented awards. Ten years later, it was adapted into a television reboot, which ran for twenty episodes and featured Larry Miller reprising his role as Walter Stratford. Since release, it has gained popularity as a cult classic, often being cited as one of the greatest romantic comedies of all time.