Edith Marie Blossom MacDonald (August 21, 1895 – January 14, 1978), also known or credited as Blossom Rock, Blossom MacDonald or Marie Blake, was an American actress of stage, film and television. Her younger sister was screen actress and singer Jeanette MacDonald. She was born in Philadelphia, Pennsylvania to Daniel and Anne MacDonald in 1895. As a youth Blossom Rock performed on the vaudeville stage with her younger sister, Jeanette, and later with her husband, actor Clarence Rock, whom she married in 1926. They had no children. She also had an elder sister, Elsie MacDonald, with whom she appeared on-stage and in vaudeville. Blossom Rock later performed in films, credited as Marie Blake, appearing opposite Joan Crawford in her uncredited debut. Her first credited major part was Love Finds Andy Hardy. She became better known, however, as Sally, the hospital switchboard operator in the Metro-Goldwyn-Mayer Dr. Kildare movie series. She later became famous (if not by name) for her television role playing “Grandmama” on The Addams Family. Blossom Rock died on January 14, 1978, in Los Angeles, California at age 82.