Besson made the announcement Saturday via his Instagram account.
Besson announced in May that DeHaan and Delevingne would play the time-traveling Valerian and his sidekick Laureline. Owen came on board in August and Hawke joined a week ago.
Besson will write and direct, while Virginie Besson Silla will produce on behalf of EuropaCorp, which will finance, produce and distribute.
The graphic novel — set in the 28th century, when humanity discovered how to time-travel — was created by Pierre Christin and Jean-Claude Mezieres in 1967 and has since sold more than 10 million copies in 21 languages. Valerian and Laureline are agents of the Spatio-Temporal Service, which protects the planets of the Terran Empire.
A global release is planned for the summer of 2017.
Hancock gained fame in the early 1960s when he joined the Miles Davis Quintet as a keyboardist. His solo works include “Cantaloupe Island,” “Watermelon Man,” “Maiden Voyage,” “Chameleon” and “Rockit.”
Hancock won an Oscar for his original score to 1986’s “Round Midnight,” which starred Dexter Gordon. He also portrayed a jazz musician in the film along with Bobby Hutcherson, John McLaughlin and Wayne Shorter.