Credit: Vince Flores/AFF-USA.COM

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.

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 by Autumn Cashmere and a billowy chiffon scarf while Seraphina looked cute in jeans, a tan tunic and red and pink socks.

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.

"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.