People have an idea that one is in control of a career, a lot more than you really are. You can engineer things to an extent. But you are at the mercy of what comes in across the desk.

It's always hard when you're playing someone for a lot of people out there who are going to see the movie after reading the books. There's a communion between a reader and the writer, so people will have an idea who Sirius Black is and I might not be everyone's idea of that.

I'm not the best audience for that because I'm not a great science-fiction fan. I just never got off on space ships and space costumes, things like that.

I went and lived in Chicago for a year , and I studied at the police academy.

The script is your map of the world, isn't it? And if someone knows that if it's well-written, you get all of the beats, it will tell you everything you need to know.

It's funny: I'm a lifelong musician, but because I principally play the piano it's been a solitary thing.

And of course I've got kids of my own now, and they love me being in the Harry Potter films. I'm now part of a phenomenon. You become incredibly cool to your kids, and you get a young fan base. So you became the cool dad at school. You're suddenly hip.