Claire Freedman is the author of several picture books, including Pirates Love Underpants!; Dinosaurs Love Underpants!; Aliens Love Underpants!; Snuggle Up, Sleepy Ones; One Magical Day; A Magical Christmas; Dilly Duckling, and My Grandparents Love Me. She lives in Essex, England. Kate Hindley is an illustrator who graduated from Falmouth School of Art in 2008. She lives and works in Birmingham.