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In page The Big Sleep (1946 film):

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Nina Foch had tested for the screen role of Carmen.[1] Hawks cast Vickers in the role after seeing a modeling photo of her. He worked with Vickers closely on the role of Carmen and later convinced Warner Bros. to buy out her contract with Universal.[2] Sonia Darrin was cast in the role of Agnes. Hawks did not like her initial screen test but after supervising her makeup and wardrobe for another test, he cast her in the part. Her credit in the movie's credits was removed when Warner Bros. studio head Jack L. Warner got into a feud with her agent Arthur Pine following the film's completion.[citation needed]