Rachel Rooney is the author of A Kid In Our Class, shortlisted for the CLiPPA Children's Poetry Prize in 2019. Rachel is also author of The Language of Cat, winner of the CLiPPA in 2011, and My Life as a Goldfish (2014). She worked as a teacher of special needs children while bringing up her three sons, and continues to take a close interest in the welfare of children with mental health problems. She lives in Brighton, England.

Milo Hartnoll studied illustration at the University of Brighton and is a painter and illustrator. Hey, Girl! is his first book. He is the son of Rachel Rooney and lives in Brighton, East Sussex.