Rihanna and Cara Delevingne are already cast in the sci-fi epic.
Herbie Hancock has joined the cast of Luc Besson's sci-fi epic Valerian.
The French director announced the news on Instagram Saturday morning, informing followers that "Herbie Hancock is a legend. His music was my only friend at 14... I learn so much listening this genius... I'm proud to have him for a role in #Valerian."