[Bong Joon-ho'] is quite different but technically, he is as clever as [Alfred] Hitchcock. That's saying something. In humanitarian terms, I think he is much cleverer. He is one of the best directors I've worked with. I absolutely adore working with him.

Be true to what you want to say, or whatever style it is that you've chosen or genre you've chosen. Do it well! My criteria always has been that the piece must stand the chance of succeeding on the level it's intended to succeed on.

Films don't take as long as people think. 'Harry Potter,' people always used to say, 'Well, my God, do you ever get any time to yourself?' I think I did, in 'Harry Potter,' over a 12 year period I did five days. So it's not exactly exhausting.

I think [ Lars Von Trier] is a fantastic filmmaker. No question. You've got to be ready for him. He's sharp and he's got a sharp tongue and I love that. He doesn't mind it back.

Film has changed vastly in the time that I've been an actor, and it's, I think, very much for the better. I think there are just magnificent films now, and they're blossoming in the way that the novel did years ago.

If I'm in theatre, cinema doesn't even cross my mind. Similarly when I'm making a film, theatre doesn't cross my mind.

I think an actor is very like a sportsman. You have periods where you're in terrific form. Everything you touch seems to work, and come right. And other times, when you're working really hard, it's okay, but it isn't scintillating.