The Princess Diaries is a charming coming-of-age comedy film in which Anne Hathaway stars as Mia Thermopolis, a socially awkward teenager who discovers that she is the heir to the throne of a small European country. As Mia undergoes princess lessons with her grandmother, played by Julie Andrews, she learns about responsibility, self-confidence, and the true meaning of being a princess. The film is a delightful blend of humor, romance, and empowerment, making it a beloved favorite among audiences of all ages.