Jennifer Lawrence in Dior Haute Couture, Claire Danes in Versace and Zooey Deschanel in Oscar de la Renta were among those in red at Sunday's show at the Beverly Hilton Hotel in Beverly Hills, Calif.
With all the pressure to strike the right style note, Lawrence, in a strapless gown with gold metal belt, broke the ice: "I don't really know what 'haute' means," she told E!
Megan Fox in Dolce & Gabbana, Amy Adams in Marchesa and Hayden Panettiere in Roberto Cavalli fueled their own trend in delicate blush-colored gowns. Amanda Seyfried struck a vintage vibe in the same palette in a high-neck gown covered in lace by Givenchy Haute Couture by Riccardo Tisci.
Julia Louis-Dreyfus' Vera Wang sweetheart gown was delicate blush covered with black lace and a floral Chantilly lace overlay.
"I'd rather be nippy than boiling hot. No, I'm not wearing any leggings or long underwear," she said.
She also said she purposely picked simple jewelry — including 11-carat diamond drop earrings and a diamond, onyx-and-ruby ring by Fred Leighton — because she wanted to honour the craftsmanship of the dress.
Jessica Chastain's Calvin Klein sea foam-blue halter gown was custom-made for her by designer Francisco Costa, and Julianne Moore said she sent an email request to friend Tom Ford to make her gown. She wore a black gown with an open cowl back and contrasting white around the waistline.
Debra Messing said it was the New York setting of her show, "Smash," that influenced her selection of a black Donna Karan strapless gown.
Katharine McPhee wore anything but boring black. She made a huge fashion statement in a modern black high-slit gown with a plunging V-neck by Olivier Theyskens for Theory.
AP Writer Beth Harris contributed to this story.