Just call him Mr. Mom!

Ben Affleck and Jennifer Garner left their new baby boy Samuel at home on Saturday to spend some quality time with the little ladies in their lives. The Argo star and his wife took daughters Violet and Seraphina out to run errands in the Pacific Palisades, and it's hard to believe that just a few short years ago, the hunky Boston native was galavanting on yachts with then-girlfriend Jennifer Lopez. He's Benny from the Block no more!

We must say... how good does JG look?! The 40-year-old mom of three seems to have lost all the baby weight, and then some! Not only that, but she seems to have finally listened to us and ditched the jeans and running shoes combo for more fashionable ensembles.

We LOVE your new look, Jen G!