(13 July 1949 - 22 June 1965) (his death) (1 child)
1. * Mary Jennifer Selznick (12 August 1954 - 11 May 1976)
Jones had an affair with film producer David O. Selznick. She separated from Walker in November 1943, co-starred with him in Since You Went Away (1944), and divorced him in June 1945.
Jones married Selznick on July 13, 1949, a union that lasted until his death at age 63 on June 22, 1965. After his death, she semi-retired from acting. According to media reports, Jones attempted suicide in November 1967 after hearing of the death of close friend Charles Bickford. She was found unconscious at the base of a cliff overlooking Malibu Beach; she was hospitalized in a coma before eventually recovering.
Jones' daughter with Selznick, Mary Jennifer Selznick (1954–1976), committed suicide by jumping from a 20th-floor window in Los Angeles on May 11, 1976. This led to Jones' interest in mental health issues. In 1980, she founded the Jennifer Jones Simon Foundation For Mental Health and Education. The Foundation pledged $400,000 to be used exclusively for the world-renowned Mary Jennifer Selznick Workshop Program, named in honor of Jones's late daughter.