I think personally it's not good for anyone - I don't think infidelity leads to happiness. It's painful for the person being cheated on, but also for the person who's cheating.

I've done a lot of very low-budget indie films, so it was just really exciting and fun to be doing a film where there's a lot more time and these huge, vast sets. I was like a kid in a playground. It was amazing!

I always hope for roles that have some depth and that I can get my teeth into and that will challenge me, in some way.

I think that when [Charles] Dickens met Nelly [Ternan] it unleashed this sort of carnal, anarchic, cruel energy within him, and literally after she met him he changed his whole life - he separated from [his wife] Catherine, he stopped all the children from seeing her and went on this bitter rampage.

"The Theory of Everything" is an extraordinary story because [Jane Hawing] was incredibly religious and [Stephen Hawking] was an atheist, so you have this conflict both on a domestic level between a couple in a difficult situation but also this bigger conflict of science versus religion, so it's a really fascinating project.

Now we live in a time where the public and the private are completely fused and there isn't such a great distinction. We know our private lives are constantly made public. With Facebook and Twitter there isn't such a desire, it feels, to keep things private.

I would work as hard as possible at school so I could keep acting alongside.