Zena Cecilia Walker (7 March 1934 – 24 August 2003) was an English actress in film, theatre and television.

She attended St. Martin's School in Solihull, and then went on to train at the Royal Academy of Dramatic Art.

She appeared twice in the TV series The Adventures of Robin Hood, the second time in the 1958 episode "Women's War".

Her most memorable performance is considered that of a mother in A Day in the Death of Joe Egg (1969), a black comedy by Peter Nichols, adapted from his stage play, about a disabled child.

She was a memorable Ophelia in Hamlet (opposite Paul Scofield in the title role), and appeared as Her Ladyship in the film version of Ronald Harwood's play The Dresser (1983).