Shelley Deborah Conn (born 21 September 1976) is an English actress. She is known for her roles as Lady Mary Sharma in Bridgerton, as Isabella in the film Love Sarah, as Dr Elizabeth Shannon in the Spielberg series Terra Nova, as Beelzebub in the second season of Neil Gaiman's Good Omens, and Indira Shetty in The Boys spin-off series Gen V, both for Amazon Prime Video.