He's gotta represent his home team!

Ben Affleck spent the day with Jen Garner and the kids yesterday, and the actor made sure everyone knew who was rooting for at the Super Bowl by wearing his Patriots hat.

The former couple went to church with the Batman star's mom, then they grabbed lunch at a local eatery. Afterwards, they took their brood to karate class, and ended up bumping into fellow A-lister Reese Witherspoon and her son Deacon!

We're surprised the Boston hunk wasn't watching the big game with his buddies, but it looks like he's doing everything he can to reconcile with his wife and it sounds like it's working! "Jennifer confided in a friend that she and Ben Affleck are getting along better than ever,” a source dished to Radar.

We have a feeling it's only a matter of time before they take that divorce off the table!