It's always nerve-racking to take off your clothes on film. But doing it with a woman felt safer than with a man. You know you can say, 'Don't grab me there: That's where my cellulite is'!

Since I had children I have taken huge amounts of time off. In a way it's a really good thing, in this show business especially, to have lots of private time, having lots of time to be in the world to observe people and read and take care of my kids helps me to come back into work with a thrill.

It's unusual to spend even three full hours away from my newborn baby, it's like a piece of my body is back in the hotel room, and it does feel strange. But I love my work, though, it's not just a job for me, punching in my time card. I've always loved what I do, it's what makes me happy and I figure if I'm happy I'll be a good Mum too.

That's one of the lucky things about getting the success later on. I know how I want to dress, I know what kind of house I want to live in, I just know more about myself, and that's true about the roles I want to play and what parts of myself I want to express. You're just more in touch with yourself.

When I had dark hair I definitely felt that I was more anonymous.

If I have to produce movies, direct movies, whatever to change the way Hollywood treats older women, I'll do it. If I have to bend the rules, I will. If I have to break them, I will.

I think every time you take on a new role, you're trying to help find that voice and you add your own bits and pieces along the way but with Noah [Baumbach] it's already done.