PIC: January Jones, Adorable Son Xander Relax Poolside

January Jones and baby Xander in Los Angeles, CA on April 29, 2012. GONZALO/bauergriffinonline.com

Little Xander's living the good life!

The 7-month-old and his mama, January Jones, hung out poolside with pals Diane Kruger and Joshua Jackson in Topanga Canyon, CA over the weekend.

Clad in a striped cotton dress, the Mad Men star–who shaded her fair skin with a straw fedora–sat with Xander on her lap, dangling her legs in the water as the happy tot clapped his hands gleefully.

january and xander swimming
January Jones and baby Xander in Los Angeles CA, April 29, 2012 GONZALO/bauergriffinonline.com

Last month, Jones, 34, opened up to Us Weekly about Xander's latest milestones.

"He's eating solids and just jabbering away," the actress told Us. "He's quite the charmer!"

He may be young, but Xander has already made quite the impression on her Mad Men colleagues.

"They made it baby-friendly for me because I'm the first female on set to have a baby," Jones revealed. "He had his own room, and I was able to work around it because I was nursing."

Xander's biggest fan? His mom's boss, Matthew Weiner.

"[Matthew] is obsessed with him," Jones laughed. "He has four boys himself so every time he sees the baby he just takes him and grabs him and that is really sweet to see."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!