Margaret Maud Tyzack, CBE (9 September 1931 – 25 June 2011) was a British actress. Tyzack was born in Essex, England, the daughter of Doris (née Moseley) and Thomas Edward Tyzack. She grew up in West Ham (now Greater London). She attended the all-girls' St Angela's Ursuline School, Newham, and was a graduate of RADA. Tyzack was noted for her classical stage roles, having joined the Royal Shakespeare Company in 1962. In the late 1970s she spent three years on stage at Stratford, Ontario, where she played Mrs Alving in Ibsen's Ghosts, Queen Margaret in Richard III and the Countess of Roussillon in Alls Well That Ends Well. She received an Olivier Award in 1982 for a revival of Who's Afraid of Virginia Woolf? in which she played Martha, replacing Joan Plowright who was ill, and a Tony award in 1991 for the play Lettice and Lovage, in which she appeared in both the London and Broadway productions opposite Dame Maggie Smith. The American Actors' Equity initially refused permission for Tyzack to join the New York production, but Smith refused to appear without Tyzack because of the "onstage chemistry" she believed the two women had created in their roles.