You always hope that the cloak of inspiration will fall, and you'll be O.K.

Wanting to be a good actor is not good enough. You must want to be a great actor. You just have to have that.

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 have three kids who like Harry Potter so I was sort of aware of it. You can't really move from it: it's on buses, in stores, it's everywhere. One of my kids has read the books; the other two are too small but they like the movies.

I tend to read non-fiction.

To be able to do this job in the first place you've got to have a bit of an ego.

When you play a character that is so emotionally closed there are times when you ask yourself if you are doing enough and if it's reading. That is where you have a director, who is the barometer of what you are doing.