Answer
Agnes Moorehead joined Orson Welles' Mercury Players in 1937. The Mercury Players was a renowned American theatre company founded by Welles in 1937. The company was known for its innovative productions, particularly its groundbreaking staging of Shakespeare's "Julius Caesar" in modern dress. Moorehead was a versatile actress who played a variety of roles with the company, including Lady Macbeth in "Macbeth" and the Nurse in "Romeo and Juliet."