I am committed to helping Alzheimer's Society in any way I can. My family and I rely on the help of organisations like Alzheimer's Society to help us understand the disease and guide us in the care of my grandmother. It's been a privilege to meet so many people with dementia.

I was trying to find ways of not being pigeon-holed like that. I didn't want to be tied down by my accent. I wanted to play Americans. I don't want to ever be doing the same thing twice, and I just didn't want to repeat myself.

I remember in 'Pride and Prejudice' I had to do a scene where I broke down. And before we filmed I spent like three hours imagining my mum's funeral. Actually, she's very much alive, happy and healthy. It was really horrible.

I don't think you should ever damage other people for your art.

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

The toughest part of acting is never a single thing. It's more like a whole character. I find film really difficult - trying to make it feel like a consistent character when you're filming everything out of order.

I have always hated nightclubs, and don't like loud music.