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She began her career in the late 1940s, appearing on stage and in small television roles in New York. Among her television appearances were three Dr. Kildare shows during the 1964-1965 season, three Perry Mason episodes during the final three years of the series, including the title roles of Katherine Stewart in "The Case of the Wednesday Woman", and murderer Rachel Gordon in "The Case of the Sleepy Slayer" (both in 1964), and four appearances on The F.B.I. (1966-70).
She appeared with the Metropolitan Opera Company ballet as well as Radio City Music Hall's Ballet Corps. Her sister, Joyce Hill Rainer, also a dancer, was lead performer with Monte Carlo's Ballets Russes.
Phyllis Hill was married twice, both times to actors and both unions were childless:
Phyllis Hill Overton died from lung cancer on New Years Day 1993, aged 72.