The Gossip Girl Cast Knows You Want It

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Olivia Palermo joined the cast of Gossip Girl, including Blake Lively, Michelle Trachtenberg, Leighton Meester, Ed Westwick, and Jessica Szohr to celebrate the publication of "You Know You Want It: Style-Inspiration-Confidence", a style guide written by the show's costume designer Eric Daman.

The event was held at Henri Bendels, and as you can probably imagine, attendees were dressed to the nines. Blake Lively showed up in a menswear inspired look, complete with Stella McCartney thigh-high boots, and Leighton Meester braved the 30 degree weather in a Louis Vuitton miniskirt, bare legs, and Balenciaga shoes. The cast is back to filming in NYC, after taking a holiday hiatus. Michelle Trachtenberg, rumored to be reprising her role as Georgina Sparks for the end of Season 3, flew in to the city yesterday from Los Angeles, where she has been seen out and about.