She attended 10 schools, was discovered by Isabella Blow, dated Mick Jagger, and is now married to the singer-songwriter Jamie Cullum, with whom she is expecting her first child. She is also a novelist. Playing with the Grown-ups, published in 2007, is a semi-autobiographical account of the troubled relationship between a young woman, Kitty, and her mother, Marina, "a beauty, a painter and a weeper". Sophie's mother is Tessa Dahl.