Edith Marie Blossom MacDonald, also known as Blossom Rock, was an American actress of vaudeville, stage, film and television. During her career she was also billed as Marie Blake or Blossom MacDonald. Her younger sister was screen actress and singer Jeanette MacDonald. Rock is probably best known for her role as "Grandmama" on the 1960s macabre/black comedy sitcom The Addams Family.

Jeanette Anna MacDonald was an American singer and actress best remembered for her musical films of the 1930s with Maurice Chevalier and Nelson Eddy. During the 1930s and 1940s she starred in 29 feature films, four nominated for Best Picture Oscars, and recorded extensively, earning three gold records. She later appeared in opera, concerts, radio, and television. MacDonald was one of the most influential sopranos of the 20th century, introducing opera to film-going audiences and inspiring a generation of singers.