My character in 'Shame' is an outrageous person. Loud and uncompromising and I begged Steve McQueen to give me the job.

Sometimes it's so weird just to do an interview. This morning I was back in my parents' house, with my brother, and we went for a jog together, then had breakfast as a family. And a couple of hours later I'm wearing high heels and a dress and makeup, and talking about my job.

In London, people can be so... well, it's not even a case of people being unkind or unfriendly. You just don't make any contact in London. You go from A to B with your eyes on the pavement.

I never get recognised here in London, which I like. Once a year, someone comes up to me and asks if I am 'so-and-so's niece' because they think they recognise me from somewhere. I like that.