Healthy love, I always think, is... wanting the person you love to be more of themselves. And I think for a parent that's a challenge, because you have to let a baby spread its wings.

For actors, being successful is generally getting a job. If you can work a lot, you're really successful. If you work a lot on projects that are interesting and intelligent and great fun to be part of, then you're hugely successful. And I feel hugely successful. I can't believe that I get to be involved with the projects and the people I work with.

I admire people who overcome obstacles or who have to commit - I've always really admired commitment, whether it be a commitment to living or a commitment to love. People who commit to a moment. People who are not somewhere else, but in the room with you.

In theatre, there's the director, the writer, and below them the actor. In film, it's the actors who are most important. That goes against the grain for me.

People can be a bit flagrant when they're having an affair. Most of the time, there's an element of it where they want to be discovered because they're in crisis. They need the boil to be burst, in some way, for a resolution.

That's the thing - you do a job like 'Shameless,' and suddenly that's why you can get a job like 'The Virgin Queen', not because of all the classical theatre you've done. But we can be very snippy about television. It's absolutely the most potent and powerful form of storytelling we have.

Nothing is more diminishing than trying to control success or hold on to things.