Cameron Diaz: 'The Other Woman' Star!

Cameron Diaz hides her face with a water bottle after breaking a sweat at a local gym on Friday (January 18) in Los Angeles.

It was recently announced that the 40-year-old actress is attached to star in the upcoming comedy The Other Woman.

PHOTOS: Check out the latest pics of Cameron Diaz

The Other Woman “centers on a woman who finds out she’s ‘the other woman’ in a love triangle and meets up with the wife in order to conspire against the husband.”

15+ pictures inside of Cameron Diaz donning a red vest…