Bennett began her film career as a demure blonde ingenue in the 1930's. Early on her acting abilities seemed a bit modest, but Bennett's warm speaking voice and quietly piquant charm gave her considerable appeal as a screen personality.Gregory LaCava's pioneering study of mental health problems, "Private Worlds" (1935), gave Bennett an unusually good acting opportunity, and the sensitivity and vulnerability she brought to the role showed the increasing resonance she was bringing to her screen work.