Getting in on all the sporty action, Camilla Belle was spotted checking out the US Open men’s semi-finals in Flushing Meadows, Queens yesterday (September 13).

The “10,000 B.C” babe looked cute and casual in a red plaid shirt and slim fit jeans as she watched Roger Federer defeat Novak Djokovic to advance to the finals.

And it has been a busy week for Miss Belle, who has also been seen enjoying the festivities of Mercedes-Benz New York Fashion Week as of late.

On the career front, Camilla is currently working on a new comedy called “Father of Invention” also starring Heather Graham and Kevin Spacey.