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Oscar-nominated actress Naomi Watts is taking on a brand new role: model. She’s been tapped to be the face of Ann Taylor‘s fall campaign. Following in the footsteps of previous ad stars Milla Jovovich and Heidi Klum, Naomi posed for legendary fashion photographer Peter Lindbergh in the collection, which a release noted “was inspired by Ernest Hemingway’s A Moveable Feast and focuses on mixing European sophistication with timeless American style.” Fall 2010 marks the one-year anniversary of head designer Lisa Axelson—who’s done some amazing things for the brand—and the new collection includes plenty of chic staples, including little black dresses, statement jewels, leopard print, and luxe coats. Watts is certainly perfect for the part—in our opinion, the cool blonde epitomizes classic style, as you can see in this exclusive behind-the-scenes shot. For more on Ann Taylor and the fall line, visit the brand on Facebook, and make sure to flip through the AT Insider tab, which features quizzes, videos, and exclusive deals. Check out our exclusive behind-the-scenes shot after the jump. More

Last weekend, a mix of British and American stars and socialites headed to Surrey, England to celebrate at Cartier’s International Polo Party. And we love seeing them in their summertime best! Both Cat Deeley (who is always fashion-forward on SYTYCD) and Leslie Mann opted to wear flowing, printed designs (Deeley’s was vintage, Mann’s Louis Vuitton) to the polo match, while Camilla Belle kept things crisp in white (with just a dash of color). Geri Halliwell broke the party’s casual fashion mold by sporting a skin-tight, figure-flattering Herve Leger minidress. The highlight of the event (besides the match)? The traditional afternoon tea, of course.

See more from this week’s hottest parties.