Holliday Clark Grainger (born 27 March 1988), also credited as Holly Grainger, is an English screen and stage actress. Some of her prominent roles include Lucrezia Borgia in the Showtime series The Borgias and Estella in Mike Newell's adaptation of Great Expectations.
Grainger was born in Didsbury, Manchester. One of her grandfathers is Italian. Her first experience of acting was at age six when she was scouted for a BBC TV series. She appeared in many TV shows and independent films as a child actor.