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Mary Stuart was born as Mary Katherine McKennis in Scarsdale, New York in 1949. She was the daughter of Gregory and Dory McKennis. Stuart dreamed of performing on stage when she was a kid. Mary attended the Rhode Island School of Design and graduated from same in 1971 with two degrees which included one in landscape architecture. Stuart moved to New York in 1972 and first began appearing in explicit hardcore movies soon thereafter. Among the notable adult film directors that Mary worked for are Radley Metzger, Shaun Costello, Carter Stevens, and Gerard Damiano. Stuart quit the porn scene circa 1977 and went on to become a passionate leading figure in environmental conservation. Mary's work in environmental conservation encompassed working with farmers, land owners, and advocacy groups as well as developing policy and delivering public education programs. In addition, Stuart was initially employed in the government before going on to become an independent consultant. Moreover, Mary also loved horses, fishing, gardening, and making jewelry which she sold privately. Stuart died from cancer at age 62 on April 12, 2013.