Many high-end designers allowed their clothing and accessories to be used in the movie, making it the most expensively-costumed film in history. After the film, Meryl Streep donated her wardrobe to a charity auction.
When Julie Andrews moved to Los Angeles to film Mary Poppins, Disney rented a house for her to live in. While filming The Princess Diaries 37 years later, Andrews discovered that the director of The Princess Diaries, Garry Marshall, now owned and lived in that same house.