It looks like Rutger Hauer has joined!
From Rutger Hauer website:
rutger*
Excuse me,
I didn't forget Roy's birthday but was
very much @ work on Besson's Valerian for a few days with great pleisure.
I will do a small vid soon on Roy celibrating x
R*
Cara Delevingne just shared a short behind-the-scenes video on her personal website. We get a glimpse of Rutger Hauer in it (wearing a yellow jacket that hurts the eyes). So it is true. He's in the film. With aparently only a few days of work, my guess it's more of an extended cameo.
shareHerbie Hancock, Rutger Hauer, this movie just keeps getting better
L'Amour est mort, vive la Haïne