January Jones Back on Mad Men Set After Having Baby

Actress spotted at work in full Betty Francis costume less than a month after giving birth to Xander Dane

January Jones is back to channeling Betty Draper Francis.

The new mom stepped out on the set of Mad Men—in costume in a colorful muumuu—less than one month after giving birth to little Xander Dane.

January seems to be doing just fine as a single mom (she still won't reveal who baby Xander's daddy is), and it turns out her baby is a good luck charm.

"Her baby had his fingers crossed," show creator Matt Weiner said after the show's latest Emmy win for Best Drama. "She told me that."

And January's costar John Slattery has said that he's met the "beautiful" baby, whom the actress is "in love with."

But don't let the actress' dowdy gown fool you—not only is January back at work, she's rockin' a fabulous postbaby bod just weeks after Xander's birth.