Marilyn Cotlow (born January 10, 1924) is an American lyric coloratura soprano best remembered for creating the role of Lucy in Gian Carlo Menotti's The Telephone in both the original Broadway and West End productions. She sang professionally during the 1940s and 1950s in the United States and Europe, performing with such companies as the Metropolitan Opera, Theater Bremen, Theater Basel, and the Wexford Festival Opera. After 1957, Cotlow mainly retired from performance to devote time to teaching voice and being a mother; although she continued to perform periodically in recitals, on the stage, and on disc up into the 1990s. She has taught vocal music on the faculties of the Peabody Conservatory, the University of Michigan, and Catholic University of America in addition to teaching privately from her home in Northern Virginia. Several of her students have had successful careers, including Alessandra Marc and Jennifer Wilson.