Anne Hathaway has celebrated the 25th anniversary of her breakthrough role in The Princess Diaries, describing it as 'one of the most magical things that has ever happened to me.' Julie Andrews and Anne Hathaway in The Princess Diaries. She said: '25 years ago, The Princess Diaries hit the big screen and I walked my very first red carpet for my very first movie. Heather Matarazzo, Anne Hathaway, Mandy Moore in The Princess Diaries. Larry Miller, Anne Hathaway, and Julie Andrews in The Princess Diaries.