Margaret Maud Tyzack (9 September 1931 – 25 June 2011) was an English actress. Her television roles included The Forsyte Saga (1967) and I, Claudius (1976). She won the 1970 BAFTA TV Award for Best Actress for the BBC serial The First Churchills, and the 1990 Tony Award for Best Featured Actress in a Play for Lettice and Lovage, opposite Maggie Smith. She also won two Olivier Awards. Her film appearances included 2001: A Space Odyssey (1968), A Clockwork Orange (1971), Prick Up Your Ears (1987) and Match Point (2005).