I wasn't aware of my dad being an actor when I was young. I remember there was an Australian children's entertainer on television called Ralph Harris and when I'd say my father was an actor, kids would say, you know, 'oh, is he Ralph Harris?' And I had to say no and then they would lose interest.

It's important to keep auditioning. If you're auditioning for something, you're auditioning for a role that people can't see you in and you need to convince them that you're the right person.

One of the things that I was interested in about Moriarty was - he's so manipulative that he doesn't need to commit violence himself or kill people - he can get everyone to do what he needs to do. And sometimes they don't even know that they are being manipulated by him.

I remember thinking, 'I'll audition just once and if it doesn't work out I'll never think about it ever again.'

I keep mementos from everything I've done.

I keep mementos from everything I've done. I've got my cab driver's license from 'Happiness.' I've got a pair of glasses and a belt buckle from playing John Lennon. I've got a pair of sunglasses from playing Andy Warhol... It's all in a box in the garage.

If you only take parts that are offered to you, you end up playing the same roles over and over again. I think it's important to keep auditioning. I think it's important to scare yourself; to take parts that are outside of your comfort zone.