Jenny Runacre is a South African-born English actress.
Runacre was born in Cape Town, South Africa. She moved to London as a child, attended the Actors' Workshop there, and trained in the Stanislavski System.
While attending the Actors' Workshop, Runacre was approached by fellow student Tom Busby, who was working as a runner for an American film production that was seeking fledgling English actresses to play opposite John Cassavetes in Husbands, a film to be shot the following year in London. The young actress auditioned with Cassavetes, Ben Gazzara and Peter Falk, and was told six weeks later that she was being offered the part of Mary Tynan in the film. Runacre accepted the offer and Husbands became her first important film role.
Runacre then joined the original London cast of Oh! Calcutta!. Runacre left the cast after a year and starred in such films as Pier Paolo Pasolini's The Canterbury Tales, John Huston's The Mackintosh Man, Robert Fuest's The Final Programme, Michelangelo Antonioni's The Passenger, and Derek Jarman's Jubilee. She was active in the theatre as well as on British television, including a part in the noted series Brideshead Revisited, playing Brenda Champion.