I think a good dollop of sadness is quite a useful thing in comedy sometimes. I think if everyone's happy all the time, it's a bit dull. It's like salt and caramel - you wouldn't imagine they would go well together, but they do.

I used to want to be in 'Downton' because I had never been in a period drama, but then I did 'The Suspicions of Mr Whicher' and had to wear one of those frocks and... I didn't feel very comfortable.

I remember doing one of those computer careers tests. It told me I'd make an ideal HGV lorry driver because I've got 100 per cent spatial awareness. I'd be able to back them into tight parking spots.

I was never one of those surly teenagers who doesn't smile. My lovely godfather said it was always lovely to see me because I was the only teenager who smiled. And I was so in awe of him, I thought it was one of the best things anyone had ever said to me. So it made me want to live up to what he said.

I'm not a pin-up, thankfully. I'm not suggesting I feel unconfident. I am beautiful to my husband. I am beautiful to my friends. I feel sexy and all those things with the people I love.