I knew it was going to be important that if I had an audience understand who she was, then all those things had to come from a place that was grounded, as opposed to being tics and manners and twitches. I didn't think it was going to be as rich, perhaps, as if I was going to make it more emotional.

My dad was an actor, and my older sister is an actress, and so I very much remember thinking, "Well, of course I'll do that as well." But I never imagined myself as an actor who would be in films. I always only thought of myself being in a play or a musical and maybe the odd episode of [U.K. '80s TV drama] Casualty. My backup plan was to do something with children, to start a nursery school or work with underprivileged kids. And I still dream of maybe doing that in some way. I've always got children in my house, always.

I'm really happy in my own skin. There's a lot of judgment that can come from outside sometimes, and there's media scrutiny that is placed on a lot of women in the public eye, and I just couldn't care less. I really couldn't care less. 'I would sometimes say in my twenties, 'oh, I couldn't care less', but I think I probably did. Now I genuinely don't and that's a lovely, liberating thing to experience.

When you're telling a story, I think you should tell it to its fullest, with reckless abandon, and absolutely let it be what it is.

Having just had a baby, I'm not going to be thinking about my arse.

Playing Juliet in Heavenly Creatures changed my life, and the role of Clementine in Eternal Sunshine of the Spotless Mind opened many new doors creatively.

People say to me, 'You seem to have made this conscious decision to do independent films'. In reality, I haven't. After each movie, I always think, 'how different can I possibly be? Is this going to challenge me, is this going to inspire me, and is this going to make me love my job more than I already do?'