The Princess Diaries movies are based on the novels by Meg Cabot, and they made some significant changes to the source material. Following Mia, a high school student who discovers she's the princess of Genovia, The Princess Diaries movies were some of the most iconic teen movies of the early 2000s. Of course, with Anne Hathaway and Julie Andrews leading the cast, it's no surprise they became a pop culture phenomenon.

While the movies try to stay true to Cabot's books, they do take some creative liberties. It's not always possible for movie adaptations to be exact replicas of the novels they are based on. Filmmakers often have to cut things, whether it's to save time or because they won't translate well on-screen. With The Princess Diaries 3 confirmed, it will be interesting to see which parts of Cabot's books are included in the next installment. As for the first two films,...