Kristin Cavallari and Jay Cutler have welcomed a little boy into the world, who they've named Jaxon Wyatt Cutler. The TV personality and her American football player husband announced the exciting news via Instagram, posting "Welcome Jaxon Wyatt Cutler 7lbs 11oz 5/7/14."

Kristin Cavalleri
Kristin Cavallari Has Given Birth To A Healthy Baby Boy.

The 27 year-old Fabulist co-host revealed her second pregnancy in October 2013 before announcing that they knew their baby was going to be a boy in February this year. "We couldn't be more excited!" Cavallari wrote via Instagram, captioning a picture of a moustache that read: "It's a BOY."

Jaxon Wyatt is now the little brother to 19 month-old Camden Jack, Kristin and Jay's other son. After having dated since late 2010, the couple were engaged in 2011 and married in June 2013 in Nashville, Tennessee.

Kristin Cavalleri Jay Cutler
Kristin & Jay Cutler Chose "Jaxon Wyatt" As The Name For Their Second Son.

"The second time around, you know exactly what to expect and we're just ready," Cavallari told People before she gave birth. "This one, I'm like, 'Let's get him out here, I want to see him, I just want to hold him and see what he looks like.' I'm just really excited more than anything."

More: Kristin Cavallari says husband "weirded out" by pregnancy sex.

In the run up to Jaxon's birth, the shoe designer told Us Weekly that she was itching to give birth, saying "I feel like I have a bowling ball in my stomach," but that her pregnancy cravings weren't driving her crazy. "I crave sweet things, but it's no different than when I'm not pregnant," she revealed.

Kristin Cavalleri Son Camden
Kristen & Jay's Son Camden Is Now A Big Brother!

"Jay's such an amazing dad," she says of Chicago Bears quarterback Cutler. "He's really sweet with Camden. He plays with him all the time. He's on the floor with him rolling around and goofing off."

The star has caused controversy with her outspoken anti-vaccination stance. "We didn't vaccinate. I read too many books about autism and the studies," Cavallari said while on FOX Business' The Independents. "There's a pediatric group called Homestead, or Home First...they've never vaccinated any of their children and they haven't had one case of autism. And now one in 88 boys is autistic, which is a really scary statistic," she said.

Cavallari made her name starring in the MTV reality series Laguna Beach as a teenager and then joined its spinoff The Hills after Lauren Conrad left the show. She is now co-host of the E! lifestyle series The Fabulist.

More: Kristin Cavallari defends decision not to vaccinate children.