Renée Zellweger forsook one of Hollywood's leading men for one of fashion's leading men on Monday night, having just left behind George Clooney in South Carolina where she's filming "Leatherheads" with the actor/director. "He's dreamy," said Zellweger. "We're having a good time." But at New York's Metropolitan Museum of Art she was carrying on with Olivier Theyskens, who was being feted by Saks Fifth Avenue's Steve Sadove and Puig president Mario Grauso.

While some of the lovelies swanned around in Nina Ricci confections, including Lauren duPont, Lauren Davis, Bee Shaffer, Renée Rockefeller and Marina Rust, others turned out in fellow Puig-owned Carolina Herrera frocks — Zellweger and Mariska Hargitay among them. After all, there's more Herrera to go around. "I just arrived three hours ago on a flight from Greenville, and I knew this would fit," said Zellweger of her sculpted, strapless Herrera cocktail dress. "I am a fan of Olivier's though. I love the dresses he makes."

Theyskens, for his part, kept his celebratory ensemble rather festive with a glittering custom tuxedo jacket. "I am shiny," he whispered. "And it's not Nina Ricci by Theyskens. I had it made by a tailor."

That same night, in L.A., a much more gregarious designer was also being honored by Saks. Wearing a St. Barth's tan and a mint green sweater, Zac Posen made a splash at Chateau Marmont for a crowd of ladies that included celebs: Demi Moore, Rachel Bilson, Felicity Huffman, Anjelica Huston, Kate Walsh, Natalie Cole and Monet Mazur, as well as socials: Jamie Tisch, Colleen Bell, Crystal Lourd and Alexandra von Furstenberg.

The fete, cohosted by Amanda Ross and Jacqui Getty, included a poolside runway presentation, during which Anne Getty furiously jotted down notes. "I'm going to order some custom pieces for me, and four for her," she said, nodding toward her daughter-in-law Jacqui, seated to her left.