Sisters Jeanette MacDonald and Marie Blake…
Marie Blake, also known as Blossom Rock (Rock being her married name), was born Edith Marie Blossom MacDonald on August 21, 1895 in Philadelphia to Daniel and Anne MacDonald. Marie was the elder sister of Jeanette MacDonald, who was born Jeanette Anna MacDonald in Philadelphia on June 18, 1903
Sisters in ‘Character’: Marie Blake as Grandmama in The Addams Family and Jeanette MacDonald as Naughty Marietta
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According to Jeanette MacDonald biographer Sharon Rich (who was also close friends with Marie Blake), Jeanette was happy that her sister Marie finally gained widespread recognition playing Grandmama, and for that reason, Jeanette never missed watching an episode of The Addams Family.
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–Annmarie Gatti for Classic Movie Hub
Marie Blake was a regular in the “Dr. Kildare” series where she admirably played the tough-on-the-surface but well-liked receptionist at the hospital front desk. One of the series features her as a kidney patient, a rare opportunity for her to show her dramatic talent. She also appeared in two Andy Hardy films as the cook, Augusta, whose high standards for the taste of coffee almost caused her to resign before the story got off the ground. If she had been a great beauty like her sister she might have gone a lot further, as it is, I enjoy her performances when I watch these old films. I am sure it was not easy to spend life in the shadow of such a great beauty and talent, her sister.