01/13/2012 AT 6:00 AM ET
With the Golden Globes just days away, Michelle Williams, Bradley Cooper and many other stars mingled at a Weinstein Company and Audi-hosted bash at West Hollywood’s Chateau Marmont. The My Week with Marilyn star spent most of her night with pal Busy Philipps, and worked the party with a smile, staying until just before midnight. A casual Cooper (in a black leather jacket) showed up later and got chummy with Williams and the party’s host, Harvey Weinstein. They captured the moment by snapping a photo together.
Also at the soiree: Lindsay Lohan, who was spotted greeting Jeremy Piven; Jane Lynch; and the cast of The Artist.
– Jennifer Garcia