Clift told a confidant they attempted but failed to have sex, only to try again years later and succeed.
He also made two other statues of her which stood at the temples of Thespiae and Delphi, one of them in gilded bronze.
Life-long friend Roddy McDowall, an actor and amateur photographer, convinced her to sit for the photo in 1956.
Collector Jim Shaudis bought the photo in 1980 and it has not been shown in public since.
Born in London, England, Elizabeth's family later moved to Beverly Hills, California, where strangers told her mother than Elizabeth should act -- her violet eyes were quite the draw in person, and once Elizabeth grew up, those eyes were even more seductive on the big screen.
The age of consent in the state was — and remains — 18, meaning Lawford would have been technically guilty of rape.