What's not to look forward to? It's like all the actors in all of the films. It's difficult to get Martin Freeman and I in a room together. Imagine what it's like to get myself, Chris Hemsworth, Robert Downey Jr., Elizabeth Olsen... these extraordinary actors who all have careers outside the Marvel Universe.

What makes a good animated movie is being able to balance adult and knowing in-jokes and also just out and out funny things that make all people laugh. The idea that it's actually something that will appeal to a family, that's the trick.

You have to sometimes just run with the problem rather than trying to solve it with hi-tech wizardry and lots of planning.

I would love to just have the work do the talking. We're in positions where people ask us questions; they want to know about more than just the work. And it can go into areas where I've completely shot my mouth off, whether it's too much about my private life or being too opinionated about things in the world. I think the better thing to do - I've learned this from people far wiser than me - is to do very good, quiet work behind closed doors.

I'm always playing characters with intellects profoundly superior to mine. That's great fun, even though it's as much a fantasy for me as for the people watching me.

[ Stephen Strange] is less strange than other characters I've played. He's lost the power to love, which doesn't make him a nasty person. I just think he's closed-off.

I'm interested in art for all. I don't want it to be only the sons and daughters of Tory MPs who get to see my plays.