Marcia Karen Wallace (November 1, 1942 – October 25, 2013) was an American actress, voice artist, comedian, and game show panelist, primarily known for her roles in television situation comedies. She is perhaps best known for her roles as receptionist Carol Kester on the 1970s sitcom The Bob Newhart Show, and as the voice of elementary school teacher Edna Krabappel on the animated series The Simpsons, for which she won an Emmy in 1992.