At that age, filming Harry Potter, I never contemplated. I just went in there and did my acting. I never thought, "What's the character actually feeling here? What's he trying to get across?" And never looked at it from that classically trained actor's point of view. And so when Jason Isaacs started throwing up these ideas, I thought, "Whoa. What an interesting way to look at acting." Which is why, again, I would do theater.

I did enjoy theater. I actually do prefer making films and television, but it was a learning experience for me, because I got into television at 5 and film at 11, and theater was something I completely bypassed.

I'm very comfortable being at home and keeping my head down, really. It's nice being invited to night clubs and stuff, which is nice once in a while, but I prefer to kind of keep to myself.

Obviously, when you're in theater, you have to be in character. You have to prepare for the unexpected. You have to be able to react to things that don't necessarily happen every night, or aren't supposed to happen every night. And you have to react to it in character. In six months, 192 shows, those things did happen. And the experience of that, the ability to stay in character, I feel like I've learned a great deal.

I must confess I don't own Harry Potter DVDs. My parents do. They have them all. And they like watching them. They've got all their home videos done in HD quality! They love it. But I struggle very much. I'm very self-conscious as an actor, anyway. I don't like watching my own performances, even in this recent one.

You have to prepare for the unexpected. You have to be able to react to things that don't necessarily happen every night, or aren't supposed to happen every night. And you have to react to it in character.

You couple that with how I looked when I was younger, and growing up... The voice is not quite breaking. It's awful. No, I don't enjoy that at all. But that's one of the things people love and find so endearing about the Harry Potter series, and why they've lasted so long. Because people have grown up with us, and they care about the characters. They're not just some characters in the film, they're people you can relate to, and you care about, and you grew up with, and when they die in this film, people feel it!