Meet January Jones’s Son Xander Dane!
The proud mom, 33, brought her 4-week-old son, Xander Dane, to the set of her AMC drama on Tuesday.
She was reportedly smiling from ear to ear as she introduced him to John Slattery and a few other cast members.
Xander, born Sept. 13, is Jones’s first child.
Mad Men recently began filming its fifth season, due to premiere in 2012.