Anne Hathaway confirms "Princess Diaries 3" is happening! 

She teased fans with a fun  Instagram video. 

Hathaway held up three fingers to reveal the third movie. 

The movie is being directed by  Adele Lim from "Joyride." 

Hathaway wrote "Miracles happen"  and "Back to Genovia." 

The "Princess Diaries" movies are  about Mia, an unexpected princess. 

Julie Andrews will likely return  as Queen Clarice. 

"The Devil Wears Prada 2" is also  in the works with Hathaway. 

Meryl Streep and Emily Blunt will  return in "Prada" sequel. 

The rivalry between Miranda Priestly and Emily heats up in the new film.