I think American actors are much more intimidated by Shakespeare.

Actors aren't stupid, mostly, and if there's a sensibility and an aesthetic that a director's going for, if you're aware of that too, you can do things to help that.

Performing a one-man Macbeth feels like the greatest challenge.

For example, Americans seem reluctant to take on Shakespeare because you don't think you're very good at it - which is rubbish. You're missing out here.

The thing with film and theater is that you always know the story so you can play certain cues in each scene with the knowledge that you know where the story's going to end and how it's going to go. But on television nobody knows what's going to happen, even the writers.

I come more to Scotland than I ever used to, so I feel more connected to it, more part of the zeitgeist. You know when you realize you have a choice and I'm choosing my homeland. It's funny: when you get older these things creep up to you.

I actually find in America, there's a slight snobbery about actors who go back and forth between big heavy dramas and popcorn fare. That always intrigues me, because that doesn't exist in the same way in Britain. And I imagine it would be worse. In terms of the sort of class, and the sort of snobby, slightly on the back-foot thing Britain has. But it's much more prevalent in America. I'm really intrigued by it. I don't know why that is. But I'm aiming to break down those barriers by being in a Shakespeare film and a Smurfs film within six months of each other.