They weren't the only notable celebs in the audience either. Funny man Will Ferrell looked surprisingly serious throughout the match, while sharing the stands with Vanessa Williams, Star Jones, and Dennis Leary.
If they were rooting for America, than they must have been a little disappointed when Serena lost 6-2, 6-3 to her Australian opponent.
It's always a tremendous achievement to make it all the way to the final match regardless, so congratulations to both Serena and Samantha!
Check out more pics of all the celebs at the match below!
[Image via WENN.]