The French director revealed the news on on Saturday (12Dec15), posting a headshot of his music idol with the caption, "Herbie Hancock is a legend. His music was my only friend at 14... I learn so much listening this genius (sic)... I'm proud to have him for a role in #Valerian."

Besson has yet to reveal Hancock's role in the film. The musician last appeared onscreen in 2002 drama Hitters.

Hancock fellow music artist Rihanna in the movie, as well as Ethan Hawke, Cara Delevingne and Dane DeHaan.

The film is based on the 1967 novel by Pierre Christin and Jean-Claude Mezieres, and is set to be released in 2017. Besson is writing and directing the film, which is due to start filming at the end of the year (15), according to The Hollywood Reporter.