Freeman was born in Brentford, London, in 1935 but raised in Merthyr Tydfil, South Wales, as a child, following the death of her father in an accident when she was 9 years old and her mother's subsequent remarriage. She graduated from the City Cardiff College of Music and Drama in 1955, and after a stay in London joined the Osiris Repertory Theatre touring company, based in Gloucestershire. She joined the Arena Theatre, Sutton Coldfield, in 1958, followed by Birmingham Rep from 1968 and 1973. Her stage appearances include Margaret More in the Welsh Theatre Company's first production, A Man for All Seasons, at Cardiff's New Theatre in 1962.