Oscar-winning actress Anne Hathaway confirms that The Princess Diaries 3 script is actively in progress and will soon make its way to the big screen, stating that she is 100 per cent ready to return as Mia Thermopolis. Anne Hathaway gained immense popularity for her role in The Princess Diaries, directed by Gary Marshall, which was a massive commercial success, collecting over $300.6 million worldwide across two films. This film follows the story of a socially awkward teenager who discovers that she is the sole heir to the throne of the fictional European kingdom of Genovia.