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.

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.

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.

Fans are really important for me. And if they take pains to write me, it's the minimum that I answer myself.

My parents were what I like to call proper musical fans. Lots of Sondheim was played in the car.

I have quite a rich inner life, and I'm constantly looking for a way to express that. I haven't found it yet in acting. When you're playing a character, you're only going to find outlets for very specific parts of your inner world.

I think that the process of making a film is an underrated factor in how that film turns out.