I had to smile when stories emerged questioning whether I was gay. Obviously I knew I wasn't but people were curiously desperate to suggest I was ... when you know a gay guy has a crush on you, it's the most flattering thing.

I was having a hard time at school, in terms of being crap at everything, with no discernible talent.

A friend often says I'm an old man in a young man's husk. I like that. I am old-fashioned in some ways.

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

Somebody I love and have a huge amount of respect for once told me something that, to this day, I don't really think I understand. It was probably toward the end of Harry Potter, and they were talking to me about afterwards and that kind of stuff. And they were saying, "You need to think of yourself as a brand and you need to protect that brand." I just don't understand what that really means in terms of being an actor, and I also think I would find that a slightly soul-destroying way to look at myself.

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

If you spent a proper amount of time with me, you would probably wonder if I was on drugs - I'm not. I'm just incredibly hyperactive and manic. I can be quiet and serious at the same time.