A tough-looking, blond Warner Bros. starlet of the mid-'40s, Minnesota-born Peggy Knudsen made an auspicious screen debut as Mona Mars in the noir classic The Big Sleep (1946). Although a mere bit -- one scene, a couple of lines of dialogue -- the character was much discussed prior to actually appearing in the film and demanded an actress who could match the buildup. The pivotal scene, in which...
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