Jennifer Garner doesn't have a care in the world -- and she also seems to be spending a lot of time at the gym! You know what that means ... revenge bod time!

On Saturday the 43-year-old actress, who split from husband Ben Affleck this summer, hit the gym in Los Angeles. Not only did she flash X17 photographers a sweet smile, but her figure is looking better than ever.

So where's Ben been? Apparently he's still spending a lot of time at the family home, which the couple just listed for sale for $45 million. Affleck has been reportedly been dividing his time between that residence and a nearby rental, and "has been since the split," a source tells People.

"Nothing has changed," another source tells the mag. "They are working together and are keeping it amicable. This is something they have been working on for over a year – and they continue to be strong unit."