Nathan had a reputation as a "ladies' man" and the character of Addison De Witt, the waspish theater critic who squires a starlet (played by a then-unknown
Marilyn Monroe) in the 1950 film
All About Eve was based on Nathan. Beginning in the late 1920s, Nathan had a romantic relationship with actress
Lillian Gish that lasted almost a decade. Gish repeatedly refused his proposals of marriage. At age 73 in 1955, Nathan married
Julie Haydon (1910–1994). She was a stage and film actress who debuted on Broadway in 1935. == Death ==