As a writer myself, my job has very often been to also write on the job. So you get the script and a vague idea of how the scene might work, and you then add funny words or change the script. I'm not the world's best writer or the world's best actor, but I can do that thing where I can fix - or ruin - fix-slash-ruin, add quirk, add value.

I'm very devoted to my kids - I'm completely blind to their faults.

Red carpets and dressing up are a part of work that I enjoy less than some people.

What having a Down's syndrome child isn't - and I feel very strongly about this - is a tragedy. All those pregnancy books you read when you are expecting refer to Down's syndrome as if it were the worst possible outcome, and it's not.

The siblings of special needs children are quite special. Absolutely accepting and totally loving, from birth, someone who is different mentally, and has a different way of seeing the world, is a wonderful trait. It's a trait I wish there was another way of getting, but there isn't. And it does involve a degree of not having it fantastically easy.

My mum's from Yorkshire and my parents aren't snotty or posh - they're very hard workers, both of them.

Getting a new passport took me a stupid amount of time. I had to go back five times with different photographs because they kept saying I was smiling, which is against the rules. I was not smiling.