Kate Bosworth joined Michael Polish at LA's Chateau Marmont last night. Michael and Kate apparently hit it off after working together on the film Big Sur, he as the director and she as the star. The evening together was Kate and Michael's third recent outing following a night out at the Chateau a few days ago. They also hit up last Wednesday's Coldplay show, where they reportedly got extremely cozy. The concert also allowed Kate to debut her blue-green hair color. Kate is the latest starlet to try out the dip-dyed hair trend, but it seems she's already back to beachy blond waves. Kate is throwing herself into her social life and possibly a new romance, since she and Alexander Skarsgard announced their split last month. However, Kate and Alex will be reunited soon to promote their Straw Dogs before it hits theaters on Aug. 16.