Camille Marie Kelly Gottlieb is an anti-drunk-driving campaigner, influencer and relative of the Monegasque princely family. She is the daughter of Princess Stéphanie of Monaco and the grand-daughter of Grace Kelly. From Wikipedia
Elisabetta Franchi modernized the iconic 1954 off-the-shoulder silhouette from Rear Window into a plunge-neck gown with a thigh-high slit