Her son, that is!

January Jones grabbed brunch with her baby boy Xander in Larchmont Village, and we can't believe he's already walking! The Mad Men star looked laid back in jeans, a black sweater, and black motorcycle boots, while her little one wore striped pajamas and a grey hoodie. Adorbs!

The blonde beauty is back on the market following her split from Sweetwater director Noah Miller, but who needs a guy when you have a baby to give you unconditional love?!

It sounds like Miss Jones just hasn't found Mr. Right yet!

Ex-boyfriend Josh Groban recently opened up about their relationship, and had nothing but nice things to say about his former lady love. "We dated for about two and a half years, and we were madly in love. It was definitely my longest relationship," he told Details magazine.

January sure is a heartbreaker!

He's on his own two feet!

January Jones and her baby boy Xander went out for some lunch in Pasadena on Monday when he decided to give the walking thing a try with success.

The 35-year-old Mad Men actress was joined by her mother Karen when her adorable son decided to make his own tracks alongside his mommy. He's getting so big!

January Jones was a mother on the move on Monday as she took her son Xander to Santa Monica to pay a visit to the pediatrician. Loving the leather jacket!

The 34-year-old actress is always on point with her parenting duties while maintaining a steady career, which she hopes to expound on with the debut of her film Sweetwater at the 2013 Sundance Film Festival.

The period drama, directed Logan Miller and Noah Miller, also stars Elisabeth Moss, Jason Isaacs and Ed Harris. Sounds like this could be a good one!

January Jones and her son Xander were snapped lunching at Houston's in Pasadena on Monday, and the Mad Men star showed off her newly dyed brunette locks!

This isn't the first time January has played around with her hair color. Back in June she went from platinum blonde to red, and while that hue was reportedly for a film role, still no word from her reps on why she went to the dark side. Maybe Betty Draper is going for a daring new look to piss off Don? Or January just wanted to switch it up for the winter? We'll keep you posted!

On Tuesday January Jones was spotted running errands with her adorable son Xander, and we can't believe how tiny she is!

Mad Men has already started shooting its 6th season, so we have to wonder if January will be putting on a few pounds to resume her role as Betty Draper. The actress famously dropped two dresses sizes when she starred in X-Men: First Class back in 2011, and since giving birth a little over a year ago, she's lost all the baby weight ... and then some!

Still no word on who Xander's daddy is, but after looking at this photo, how can you NOT speculate that it's Jason Sudeikis?

January Jones took her adorable son Xander for a stroll in Beverly Hills over the weekend, and the typically stone-faced Mad Men starlet couldn't stop smiling!

But we're still dying to know ... who IS Xander's daddy? January still hasn't dished the deets on who fathered the child or whether he has a relationship with the tiny tot. Not like it's any of our business, but when your ex is Jason Sudeikis and your kid looks just like him, we have to wonder!

Even when they're not onscreen, Don and Betty sure are one good looking couple!

January Jones and her Mad Men co-star John Hamm posed on the black carpet at The Paley Center for Media's annual Los Angeles benefit, and they were also joined by Elisabeth Moss, Vincent Kartheiser, Rich Sommer, and Ben Feldman.

The benefit honored Mad Men's network, AMC, which also brings us amazing shows like Breaking Bad and The Walking Dead. “We are also excited to recognize AMC Networks, which under the innovative leadership of Josh Sapan, has evolved into one of today’s most influential entertainment companies,” Pat Mitchell, Paley Center president and CEO, said in a statement.

Check out the gallery below for more photos!

On Saturday, January Jones got in the Halloween spirit as she took her baby boy Xander out to go pumpkin shopping at a Moorpark Farmer's Market in Oxnard, CA.

The Mad Men actress has enjoyed spending these precious moments with her little boy whenever she's not working on her career. She just knows what it takes to be a good mom!