'Mama' Cass Elliot，Cass Elliot was born Ellen Naomi Cohen on September 19, 1941, in Baltimore, Maryland. She grew up in the Washington D.C. environs and in her senior year of high school, performed in a summer stock production of "The Boyfriend" at the Owings Mills Playhouse, where she played the French nurse who sings "It's Nicer, Much Nicer in Nice.