The Princess in 'The Princess Diaries' is AMELIA, a six-letter name. AMELIA is the main character of the 2001 film and its 2004 sequel, based on the novel series by Meg Cabot. She is a shy, awkward teenager who discovers she is the heir to the throne of the fictional country of Genovia. She must learn to navigate her newfound royal responsibilities while also dealing with the everyday struggles of being a teenager.