I saw Cara Delevingne like five, six times. And I was never talking about the film [Valerian]. And then at the end, I say okay, let's do some test. She says yeah, yeah, good. So I took her in the room, and I test her for like six hours non-stop. Exercise, exercise, exercise for six hours. It was actually funny. And then I knew at the end of the six hours.

I would rather stop [making movies] too soon than too late.

I wanted to do something that was entertaining - but with a catch.

I won't be able to do a film just for bad reasons, for money or for - I just can't. If I have one more where I feel I can bring you something, I will do it.

I have like 10 actors and 100 aliens in the film [Valerian]. And they come from the four corners of the universe. Some of them are liquid. Some of them are just [so visually] crazy.

For example, in your house, you have the heater on the ground itself. Here, it's the gravity. No matter where you are, that's where the gravity is coming from. It's almost like a carpet that you put down. If you're on the other side, it doesn't matter to us because we're still walking on the ground. Actually, at the beginning of the film [Valerian], we see when they install the gravity system.

If you're someone from the government and you meet people from other countries, you want to know who you're dealing with. It's the same for them [in Valerian].