Marcia Mitzman Gaven (born February 28, 1959) is an American actress from New York. Since studying at the High School of Performing Arts and the State University of New York at Purchase, she has appeared in many musicals during her career singing in both mezzo-soprano and soprano roles. Her Broadway debut came in 1979 when she played Betty Rizzo in Grease, serving as the replacement for the original actress of the role. In the 1980s she appeared in the musicals The Rocky Horror Show, Oliver!, Zorba, Nine, Anything Goes, Chess, and Welcome to the Club, and in the operas Brigadoon, South Pacific, and Sweeney Todd.