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.

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 don't look like Catherine Zeta-Jones, so I don't think Hollywood would be that interested in me, to be honest. I just want nice work.

I think it helps to have a good old-fashioned trajectory, plodding along. Obviously one has an ego and it's really easy to have that ego tickled, but what helps me get through the night is if I concentrate on just quality of work so that I don't panic about my profile.

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.

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.

As I get older, I want to draw on my experience to make roles better. I see that in the older women who inspire me - their experience makes them better.