Princess Mia is a fictional character from the Princess Diaries series, created by Meg Cabot. She is the teenage heir to the throne of the small European principality of Genovia. The story follows her journey as she navigates the challenges of adolescence while learning about her royal responsibilities. Mia is known for her relatable personality, often feeling awkward and out of place. Throughout the series, she develops from a shy girl into a confident young woman, embracing her identity as a princess. The books explore themes of friendship, self-discovery, and the balance between personal desires and public duties.