January Jones: Baby Xander's First Pictures!

January Jones debuts her almost 1-month-old son Xander while leaving an office building on Tuesday (October 11) in Los Angeles.

The 33-year-old Mad Men actress, who gave birth on September 13, got back to work on her hit AMC series the day before.

PHOTOS: Check out the latest pics of January Jones

“I think she’s going to be a great mom,” January‘s co-star, Elisabeth Moss, previously told Us Weekly. “She’s a very caring and protective person, and I think she’s going to fit in very well with motherhood.”

FYI: January is wearing an Alexa Chung for Madewell “Patrice” lace top. She is also using her Orbit stroller!