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 like to keep pushing myself and trying things out. I get easily bored, so I need a challenge.

When you're a young actor, there's this pressure to rush. But I hope to be doing this into my sixties and seventies, so I'd prefer to take my time.

I made a film called "The Theory of Everything," which is based on Jane Hawing, who was married to Stephen Hawking - it's based on her book about their relationship.That's what the film will be about - they were both incredible, strong, willful individuals and I feel like that Stephen Hawking himself would say that he wouldn't have survived without the influence of Jane Hawking, and they were an incredible team together.

Sometimes there are changes that need to be made.

"The Invisible Woman" was about trying to show this conflict in [Nelly Ternan] woman truthfully, between her own identity, but also being in love with someone who I think made very high demands from her.

Now younger actresses will have a confidence in those discussions with their agents and be able to say, "Can we make sure that I'm being paid the right amount for the work that I'm doing?"