Three children have become adults since a phone call with Jo Rowling, containing one small clue, persuaded me that there was more to Snape than an unchanging costume, and that even though only three of the books were out at that time, she held the entire massive but delicate narrative in the surest of hands.

I love working in New York theater.

Do you know that moment when you paint a landscape as a child and, when you're maybe under seven or something, the sky is just a blue stripe across the top of the paper? And then there's that somewhat disappointing moment when the teacher tells you that the sky actually comes down in amongst all the branches. And it's like life changes at that moment and becomes much more complicated and a little bit more boring, as it's rather tedious to fill in the branches.

I want to swim in both directions at once. Desire success, court failure.

The first time that I came to New York to work properly was the mid-'80s, but I was doing eight shows a week. You have no life. Going to a punk rock club - or whatever the music was at that time - would not have been on my agenda.

I'm a quite serious actor who doesn't mind being ridiculously comic.

I am hellbent on defying your expectations, at every turn, and even if you don't like what's being done, I dare you to find it uninteresting.