 Stewart adopted Gloria's two sons, Ronald (1944–1969) and Michael (born 1946), and with Gloria, he had twin daughters, Judy and Kelly, on May 7, 1951.Ronald was killed in action in Vietnam on June 8, 1969, at the age of 24, while serving as a lieutenant in the Marine Corps.Stewart was guarded about his personal life and, according to biographer Scott Eyman, tended to avoid the emotional connection in interviews he was known for in his films, preferring to keep his thoughts and feelings to himself.