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.

The common misconception is that we create films for ourselves. And I really don't do it for myself. I get stopped in the street by people saying, "Do you mind if I say this about your work?" Do I mind? I'm delighted. I do it for you. It's not for me. It's my living, yes, sure.

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.

You have to learn to cut your cloth accordingly. But it seems to be a human weakness. Once you start making a lot of money, you just join in with everyone else. It's like the banks, and we've seen what happens there.

There are certain people that when they ask you to do a film, you just say, "Where and when?"

I turn up in Los Angeles every now and then, so I can get some big money films in order to finance my smaller money films.

I wanted to work with those boys (producers Andy and Larry Wachowski) because they're so eccentric and peculiar. Larry, of course, is halfway towards being a woman now. It's a crazy world.