I've always thought that as long as directors and casting directors don't see me as just Harry Potter, I'll be OK. People have shown a lot of faith in me, and I owe them a huge debt. They're letting me prove that I'm serious about this.

I basically have the diet of a 19th-century Irish navy, apart from the litre of stout a day. It's meat and potatoes and bread and cheese: those are my four food groups.

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

The happiest I ever am is spending time with a group of really good friends. That's all I aspire to in life, really.

I always feel that if you put me in a room with a director and a writer and let me talk about the script, I can give a good account of myself.

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 thought I was an actor playing a wizard. But really, I was a wizard playing an actor.