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Oklahoma!, Richard Rodgers and Oscar Hammerstein II's groundbreaking musical, marked Holm's Broadway debut in 1943. This iconic production revolutionized musical theater by seamlessly integrating music, dance, and dialogue into a cohesive narrative, setting the standard for future musicals. Holm's portrayal of Ado Annie Carnes, a vivacious and charming farm girl, garnered critical acclaim and solidified his status as a rising star on Broadway.