Sandra Dale "Sandy” Dennis (April 27, 1937 – March 2, 1992) was an American theater and film actress. At the height of her career in the 1960s she won two Tony Awards, as well as an Oscar for her performance in Who's Afraid of Virginia Woolf?.

Sandy Dennis, Anne Bancroft, Zoe Caldwell, Viola Davis, Colleen Dewhurst, Maureen Stapleton, Irene Worth, and Audra McDonald are the only winners of Tony Awards for both Best Actress in a Play and Best Featured Actress in a Play.