However, Disney's involvement in Disney World ended in late 1966, when he was diagnosed with lung cancer in his left lung, after a life-long habit of chain smoking. He was checked into the St. Joseph's Hospital across the street from the Disney Studio lot and his health eventually deteriorated causing him to suffer a cardiac arrest. He died on December 15, 1966, ten days after his 65th birthday. He was cremated on December 17, 1966 at the Forest Lawn Cemetery in Glendale, California. Roy...