With her adorable little man by her side, January Jones went for a walk with her sister and their dog in West Hollywood on Saturday (May 11).
The "Mad Men" star wore a gray long-sleeved striped top and blue jeans as she alternated holding Xander's hand and carrying him when he got tired.
Though slim and trim in real life, the 35-year-old actress portrays Don Draper's weight-gaining former wife in the hit AMC series.
Speaking about playing "fat Betty," January shares, "It's been an acting challenge and a physical challenge. But I've really embraced it, and I love where [creator Matthew Weiner] has taken the character."