1. The film title was inspired by one of the film's screenwriters, who was going through her high-school diary and found a list she had made of things she hated about her then-boyfriend.
2. Heath Ledger was Julia Stiles' first on-screen kiss.
3. Alison Janney improvised the "Kat. Meow" line, also known as one of the best moments in the film.
4. Julia Stiles' tears when she reads out her poem were real and not planned.
5. And Kat doesn't actually hate 10 things about Patrick, more like 14.
6. Even though in the movie she's older than her by two years, Julia Stiles is only three months older than Larisa Oleynik who played Bianca.
7. In the original script, Kat's mum was still around but it was cut to apparently help give some context for why Kat acted how she did.
8. This was Heath Ledger's first American film.
9. Ashton Kutcher and Josh Hartnett were also in the running for the role of Patrick Verona.
10. The dance scene helped Julia Stiles get a role in Save the Last Dance.
11. Joseph Gordon-Levitt and Larisa Oleynik's characters in 3rd Rock From the Sun also dated.
12. At the end of the movie, the band actually played on the roof and apparently it was quite scary.
13. Julia Stiles has been connected to a film version of The Bell Jar for a few years, the book Kat reads in the movie.
14. Joseph Gordon-Levitt's character learns French so that he can tutor Bianca, but in real life the actor is fluent in the language.
15. Larisa Oleynik, who played Bianca, actually attended the Sarah Lawrence college that Kat is accepted to in the film.
16. There's a direct quote from "The Taming of the Shrew", the Shakespeare play the film is based on.
17. Padua High School, where the characters all attend, is a reference to Padua, the setting of the play.
18. And Patrick Verona's surname comes from birthplace of his equivalent character in the Shakespeare play.
19. The Stratford sisters are called so in homage to Shakespeare's birthplace, Stratford-upon-Avon.
20. If Davd Krumholtz looked familiar, it's because he's also the elf in The Santa Clause.
21. And during filming, he taught Andrew Keegan how to best draw a dick on his face.
