Ellen Naomi Cohen (September 19, 1941 – July 29, 1974), known professionally as Mama Cass and later on as Cass Elliot, was an American singer and voice actress. She was a member of the singing group the Mamas & the Papas. After the group broke up, Elliot released five solo albums. In 1998, she was posthumously inducted into the Rock and Roll Hall of Fame for her work with the Mamas & the Papas.

Ellen Naomi Cohen was born in Baltimore, Maryland, on September 19, 1941, the daughter of Philip (died 1962) and Bess Cohen (née Levine; 1915–1994).

Elliot retired to an apartment in Mayfair at Curzon Place at which singer-songwriter Harry Nilsson allowed her to stay. Several hours after Elliot left Jack Martin’s cocktail party she died in her sleep at age 32. According to Keith Simpson, who conducted her autopsy, she died of a heart attack, and there were no drugs in her system. Elliot died in Flat 12, 9 Curzon Place (later Curzon Square), Shepherd Market, Mayfair, London, owned by Harry Nilsson. Four years later, The Who‘s drummer Keith Moon died in the same bedroom, also aged 32 years.