Primarily an illustrator of children's books Catherine Rayner has shown work in galleries throughout the UK. She has work in private collections throughout the world and in several public collections including Seven Stories Centre for Children's Books in Newcastle.

Catherine has had seven children's books published to date. Her first book Augustus and his Smile, won the Booktrust Early Years Award and went on to be short-listed for both the V&A Illustration Awards and The Macmillan Prize for Children's Picture Book Illustration.