MCCartney will also provide the voice of one of the characters in High in the Clouds.

According to Deadline, one of the songs he has been working on features Lady GaGa.

She let slip about the top secret collaboration in February (15), when she took to Instagram and wrote, "Had a beautiful session with Sir Paul McCartney and friends. Working on one of his many secret projects! Killer musicians, vibe, and lots of laughs."

High in the Clouds will be directed by Cloudy With a Chance of Meatballs 2's Cody Cameron following the departure of Mulan director Tony Bancroft.