I'm not an easy person to love. There are lots of times when I'm a very good boyfriend, but there are times when I'm useless. I mean, I'm a mess around the house. I talk nonstop. I become obsessed with things.

When actors aren't filming they just go to their dressing rooms and relax.

As far as I can tell, most actors' main motivation is self-doubt and neuroses.

I could never do stand-up because it's that thing of having to get up on stage. And out of every 10 jokes you tell, nine of them have to get a really good response.

I think Harry Potter's very important. Every opportunity I will get for the rest of my life, I would not have got if it wasn't for Harry Potter. And it would be height of ingratitude if I was ever anything but proud to be associated with these films.

I don't want to say I'll never play someone with a cockney accent, but I think I would be irritated by me doing it.

If you like the book, you'll hate the movie.