Julie Andrews Has a Secret Role in 'Aquaman' - Find Out More!

Julie Andrews has a part in Aquaman!

The Mary Poppins Hollywood icon will appear in the upcoming superhero film, EW confirmed on Friday (November 23).

PHOTOS: Check out the latest pics of Julie Andrews

Julie will voice Karathen, an undersea creature who holds the key to Arthur Curry’s (Jason Momoa) quest to uniting the Atlantean and surface worlds.

Interestingly, Disney’s Mary Poppins Returns, the sequel to the 1964 movie starring Julie, also hits theaters in December. She reportedly did not want to appear in the sequel because she didn’t want to distract from the main star Emily Blunt, but is supportive of the movie.

“We wanted the Karathen to have the voice of a classic British actress, albeit somewhat digitally altered. And when we found out Julie was interested and available and excited to do it, casting her was a no-brainer. Who knew that Aquaman would have the real Mary Poppins this Christmas?” said producer Peter Safran.

Aquaman is set to be released in theaters on December 21.