We all have our limitations.

I'm besotted by [Kirsten Dunst] now. I think she's just wonderful. I can't think for a second that however much she'd worked in America, she would never have had the chance to play [a role in Lars Von Trier's 'Melancholia' ] like that. You have to get outside of the States to do something like that.

I love working with Lars [von Trier]! I've worked with him three times. I did the narration of Dogville and Manderlay.

I'd say the film to avoid is a director's second film, particularly if his first film was a big success. The second film is where you've really needed to have learned something.

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.

It's quite interesting, looking back at the first one [film about Harry Potter], nobody knew whether or not it was going to be successful as a film. The books were of course already very successful, but that's happened before, where the books were successful and the films weren't at all. But it turned out that they were.

I mark a script like an exam, and I try not to do anything under 50 per cent. Similarly with the part. And also film is a peculiar thing, parts don't necessarily read in script form anything like as well as they can do when it comes to materialising.