Holliday Clark Grainger (born 27 March 1988), also credited as Holly Grainger, is an English screen and stage actress. Some of her prominent roles are Kate Beckett in the BAFTA award-winning children's series Roger and the Rottentrolls, Lucrezia Borgia in the Showtime series The Borgias, Robin Ellacott in the Strike series, DI Rachel Carey in the Peacock/BBC One crime drama The Capture and Estella in Mike Newell's adaptation of Great Expectations.