Pictures of Kate Bosworth, Nicole Richie, Chloe Sevigny at Valentino Cocktail Party 2010-04-30 12:57:29

Last night, Valentino-styled celebs stepped out to honor the label's creative directors, Maria Grazia Chiuri and Pier Paolo Piccioli — and share a few cocktails — in West Hollywood. Chloe Sevigny and Kate Bosworth played hostesses, along with Teen Vogue's Lisa Love, and set the fashion bar high — I'm crushing hard on Kate's red leather pants. True Blood couple Anna Paquin and Stephen Moyer brought their A-game, and Amber Valletta wowed with something leggy. Click on to get the whole Valentino-clad crew.