Last night, Mulberry celebrated the launch of its Fall 2010 collection with some summertime fun, hosting a pool party for some of Hollywood’s most fashionable females at the storied Chateau Marmont. The stylish attendees included Alexa Chung (who even has a namesake bag by the label) looking cool in vintage cutoffs and a washed silk blouse and Kate Bosworth, who wore a graphic T-shirt with black skinny jeans. Cat Deeley, Molly Sims, 90210‘s Shenae Grimes and Jessica Stroup sipped Mulberry mojitos and took pictures with the brand-new Polaroid cameras strewn about, then Chung spun tunes (and Kelly Osbourne put in her own two musical cents) at the after-party at Bungalow 1. The result? One super-cool and stylish fete. Click through our gallery to see all the stars at Mulberry’s bash.