Credit: GSI Media

Betty Draper's got her figure back!

January Jones stepped out for the first time with her 2-week-old son Xander Dane Jones on Tuesday. Clad in black pants and a loose beige top, the Mad Men star, 33, brought her baby boy to a friend's house in Santa Monica, Calif. See more pics of January out and about post-birth.

Although Jones has introduced her first child to the world, she's yet to reveal Xander's father. Court documents filed Friday with the Los Angeles County Department of Public Health show that the X-men actress left the father's name off of her baby's birth certificate.

This is the first time Jones -- who dated Saturday Night Live's Jason Sudeikis, singer Josh Groban and Ashton Kutcher in the past -- has been spotted out with her bundle of joy. Her fellow Mad Men crew is bubbling with excitement for the new mommy.

"We're all so proud of her and happy for her and she's doing really well," costar recently Elisabeth Moss told Us Weekly.

On Sunday, Mad Men costar John Slattery gushed about the blonde bombshell's babe. "I've seen a picture of the baby. He's beautiful," Slattery told Us at the Rape Treatment Center's Annual Brunch. "She's in love with that boy."