Princess Diaries 3 is officially in the works at Disney . Princess Diaries already has two movies out, and now, 18 years later, writer Aadrita Mukerji is working on the script for the third movie. The movie tells the story of a teenager named Mia Thermopolis, played by Anne Hathaway who surprisingly learns the astonishing news that she is actually a real-life princess. Mia later begins a journey toward the ...