Ariel de Ravenel is a Paris-based fashion consultant who runs Loulou de la Falaise’s brand and works with designer Olivier Theyskens. Natasha Fraser-Cavassoni is the Paris-based author of Sam Spiegel, Tino Zervudachi: A Portfolio, and Dior Glamour. Pierre Bergé cofounded the house of Yves Saint Laurent with his longtime partner, the celebrated couturier.