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Ida Lupino directed eight films, making her a pioneering female filmmaker in Hollywood. Her directorial debut, "Not Wanted" (1949), tackled the controversial topic of unwed motherhood, and she continued to explore social issues in subsequent films such as "The Hitch-Hiker" (1953) and "The Trouble with Angels" (1966). Lupino's films were often characterized by their realism, psychological depth, and strong female characters.