Richard Avedon, 1953. Hepburn looking back over her shoulder. A signature image of the actress.
From Wikipedia
Audrey Kathleen Hepburn was a British actress and humanitarian. Recognised as a film and fashion icon, she was ranked by the American Film Institute as the third-greatest female screen legend from the Classical Hollywood cinema. She was inducted into the International Best Dressed Hall of Fame and is one of only a few entertainers who have won competitive Academy, Emmy, Grammy and Tony Awards.