The third instalment of The Princess Diaries is reportedly in the making by Disney, with Aadrita Mukerji writing it.

According to reports, it is unclear if actor Anne Hathaway, who headlined the first two films, will be returning, along with Julie Andrews who played her grandmother. However, Anne expressed her interest in returning. Speaking to Entertainment Tonight, the actor said, "I would more than entertain it, I’m pulling for it. If there’s any way to get Julie Andrews involved, I think we would make it work.”

While much about the plot of The Princess Diaries 3 is not yet known, it is expected to be a continuation to The Princess Diaries: Royal Engagement.

The The Princess Diaries was directed by late Garry Marshall and is based on Meg Cabot's book by the same name. It is about an awkward American teenager Mia Thermapolis who suddenly discovers her royal heritage and is declared the heir of fictional country Genovia. The first and second part were released in 2001 and 2004 respectively.