Audrey Hepburn has her fair share of recognizable film costumes, from her black column dress in “Breakfast at Tiffany’s” to her Edwardian-inspired “My Fair Lady” frock. Her strapless ballgown in “Sabrina,” however, is just as noteworthy.

At the inaugural ball, the president’s daughter wore an exact replica of the iconic Givenchy dress originally worn by the actress. The Arnault family, which controls LVMH — the conglomerate that owns