Celebrities at the US Open Tennis 2012

Serena Williams clinched the female title last night at the US Open in NYC! This evening, the men's final will take place between the UK's Andy Murray and Serbia's Novak Djokovic. There were plenty of celebs in the stands last night cheering on Serena against her rival, Victoria Azarenka. Anna Wintour broke from Fashion Week for tennis, while Amanda Seyfried, Will Ferrell, Elizabeth Olsen, and Josh Hartnett cheered on their favorites.

Click through to see all the stars at the US Open so far!