Catherine Steadman is a London-based actor and author. She has starred in leading parts on both British and American television, as well as on stage in London's West End, where she was nominated for a Laurence Olivier Award. She grew up in Hampshire's New Forest and now lives with her husband and daughter in North London. Something in the Water, Steadman's debut novel, was a New York Times bestseller with rights sold in over thirty countries. Hello Sunshine, Reese Witherspoon's producing business, has also purchased film rights.

Nobody, Steadman's second novel, was released in 2020. Her novel The Disappearing Act is her third.