Kathy Ann Najimy (/ n ə ˈ dʒ ɪ m i / nə-JIM-ee; born February 6, 1957) is an American actress. She is best known for voicing Peggy Hill on the animated television series King of the Hill, and her roles as Sister Mary Patrick in the comedy film Sister Act, Mary Sanderson in the comedy-fantasy film Hocus Pocus, and Olive Massery on the..