"The Princess Diaries" Threequel in Works at Disney

A third Princess Diaries movie is in the works at Disney.

The Princess Diaries is a coming-of-age comedy based on the popular novel series by Meg Cabot, which Disney released in 2001.

It followed Mia Thermopolis (Anne Hathaway), a San Francisco teenager who comes to discover she is the heir apparent to the throne of Genovia.

Julie Andrews co-starred in both the 2001 movie and its 2004 sequel "The Princess Diaries 2: Royal Engagement" as Mia’s grandmother and Genovia’s Queen regent, Clarisse Renaldi, with the two big-screen releases collectively grossing over $299 worldwide.

The late Garry Marshall directed both movies — working from scripts by Gina Wendkos for the original and Shonda Rhimes for the sequel.

Details as to the threequel’s plot and the involvement of Hathaway and Andrews are currently under wraps. 

The threequel is penned by Aadrita Mukerji and is understood to be a continuation of the past story, rather than a reboot.

Hathaway has previously shared her interest in reteaming with the Mary Poppins Oscar winner. 

“I would more than entertain it, I’m pulling for it,” she told Entertainment Tonight while promoting her new movie, Armageddon Time.

 “If there’s any way to get Julie Andrews involved, I think we would make it work. We would go to where she was and put a green screen behind her and just make it happen.”