It's been 20 years since we were graced with one of the most epic teen movies of all time, 10 Things I Hate About You. The film premiered on March 31, 1999, and with it turned Julia Stiles, Larisa Oleynik and the late Heath Ledger into household names. Adapted from Shakespeare's TheTaming of the Shrew, the movie starred Stiles as Kat Stratford, an abrasive teen just trying to get through high school, and her younger sister, Bianca, a popular sophomore who can't go on a date unless her sibling does. Cue hilarity and the most memorable cover of "Can't Take My Eyes Off You" ever. Go ahead and break out your Letters to Cleo albums and ringer tees -- we've got some memories to relive here, people!