The Princess Diaries(2001)
Based on the novel of the same name. Mia Thermopolis is an unpopular 15-year-old private school sophomore who lives with her mother Helen and her cat, Fat Louie in a renovated San Francisco firehouse. She remains forever invisible to her crush Josh Bryant and his girlfriend cheerleader Lana Thompson. Despite this, she has one best friend in the form of her friend Lily Moscovitz and her brother Michael. On her 16th birthday, her grandmother visits from the small European country of Genovia and explains that due to the recent death of Mia's father, she is the next in line to the throne of Genovia! Now Mia has a few weeks to become a princess and change her looks, behavior, and every aspect of life to be a princess before she takes the throne.