Lookin' good, ma!

Jennifer Garner is picking right back up with her mommy duties, despite giving birth to her and Ben Affleck's first son, Samuel, just three weeks ago.

PHOTOS: Jennifer Garner's third pregnancy -- a look back

In Santa Monica, Calif. Thursday, the beaming mom of three was in good spirits as she took her daughter Seraphina, 3, to the doctor's office.

The actress, 37, covered up in straight-leg jeans, a blue cardigan and a billowy chiffon scarf while Seraphina looked cute in jeans, a tan tunic and red and pink socks.

PHOTOS: Violet's cutest moments

Last week, Garner made her post-baby debut when she stepped out in Santa Monica with her daughter Violet, 6, who carted a baby doll in a toy carrier.

PHOTOS: Her life as a supermom

"I live my life at these two extremes," Garner has said about her busy life. "I'm either a full-time stay-at-home mom or a full-time actress.

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly