Huth is the daughter of the actor Harold Huth. She left school at age 16 in order to paint and to study art in both France and Italy. At 18 she travelled, mostly alone, across the United States before returning to England to work on a variety of newspapers and magazines. She married journalist and travel writer Quentin Crewe and soon became known most for her writing, having written three collections of short stories and eleven novels. She also writes plays for radio, television and stage, and is a well-known freelance journalist, critic and broadcaster. She is a Fellow of the Royal Society of Literature.