Helen Cooper is a British illustrator and an author of children's literature. Cooper has twice been awarded the Kate Greenaway Medal from the Chartered Institute of Library and Information Professionals (CILIP), recognising the year's best children's book illustration by a British subject. She won for The Boy Who Wouldn't Go To Bed in 1996, which she wrote and illustrated. In 1998 she won for Pumpkin Soup, which she also wrote and illustrated. They were consecutive projects for her.