Agnes Moorehead: Agnes Moorehead. Actress: The Magnificent Ambersons. Agnes was born of Anglo-Irish ancestry near Boston, the daughter of a Presbyterian minister (her mother was a mezzo-soprano) who encouraged her to perform in church pageants. Aged three, she sang 'The Lord is my Shepherd' on a public stage and seven years later joined the St. Louis Municipal Opera as a dancer and singer for four years. In keeping with her father's dictum...