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Dennis appeared in the films "The Three Sisters" (1966), "Up the Down Staircase" (1967), "That Cold Day in the Park" (1969), "The Out-of-Towners" (1970), "God Told Me To" (1976), "The Four Seasons" (1981), "Come Back to the Five and Dime, Jimmy Dean, Jimmy Dean" (1982), and "Another Woman" (1988). Her final film appearance came in the crime drama film "The Indian Runner" (1991).