Elephant Man [movie] was much more difficult physically. This had a couple of days. It was quite tricky. I had my leg strapped up behind me and I am a little older now. It was all marvelous, though. He [Bong Joon-ho] is one of the most fabulous directors in the world.

By the time I came to do the final ones [Harry Potter's film], I was working on something that was massively successful. There was a huge difference in indulgence and all sorts of stuff. A very big difference in peoples' attitudes. They were very pleased with themselves. In human terms, it was quite interesting to see the difference.

The only concession you can make is to what you believe is right.

When you're really working well with a director then you can be as outrageous as you like and so can he. And there's no worry about it.

One wonders sometimes, looking at the world, how it's dealing with itself. There are days when you wake up and you feel very optimistic and there are days when you feel pessimistic.

My springboard is always the script. Even if the script is taken from a novel, I often haven't read the novel...

I've never known what I've wanted to do. I've never planned anything in my life.