Paula Hawkins

The journalism, I was a financial journalist - it's very good training as a writer. You have to write for deadlines; you have a certain economy of phrasing. As a training ground as a writer, it's fantastic. I also think it teaches you to be observant, to listen to people, and gives you an ear of dialogue from doing interviews.

I don't have a partner, so I take care of the mortgage by myself, and I was thinking, 'Oh God, I'm going to have to sell the house or find a new career.' I was not in a good place, but it was a real spur to get 'The Girl on the Train' right. I had to nail it and do it really well. It really concentrates the mind, that kind of thing.

Listening and hearing are two different things, and acting is comprehending what the person is saying, thinking how it makes you feel and responding. That's the key to really honest, truthful, compelling performance.