"The Princess Diaries" is a 2001 film directed by Garry Marshall and based on the novel by Meg Cabot. The story follows Mia Thermopolis, a shy teenager who discovers she is the heir to the throne of the fictional European country of Genovia. With the help of her estranged grandmother, Queen Clarisse, Mia learns to embrace her royal identity while navigating the challenges of adolescence. The film features a blend of comedy and coming-of-age themes, showcasing Mia's transformation from an awkward girl to a confident princess. It stars Anne Hathaway as Mia and Julie Andrews as Queen Clarisse, receiving positive reviews for its charming performances and relatable storyline.