Kristin Cavallari Is Pregnant!

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Baby on board!

On-again fiances Kristin Cavallari and her NFL player beau Jay Cutler were busy planning their wedding, and now, a source tells Us Weekly, they're prepping for a new family milestone: a baby!

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"She is really happy. She is in the early stages, but she can't wait to be a mom," the source tells Us. "They have just bought a house in Tennessee and can't wait to start their family."

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The pair met in August 2010 through mutual friend E! News host Giuliana Rancic and after just eight months of dating, Cutler, 28, popped the question in Cabo San Lucas, Mexico in April 2011.

That July, the couple called off their engagement of just three months and sent back their wedding gifts. But after showing up to support each other at their respective gigs (Cavallari was competing on Dancing with the Stars at the time and Cutler was starting the 2011-2012 NFL season), the Laguna Beach alum and the Chicago Bears quarterback mended their issues and announced that their nuptials were back on in November.

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"The past year has been interesting," Cavallari, 24, told Us at an Alice + Olivia event in December. "There have been a lot of ups and downs, but overall it's been great."

"We're just enjoying being engaged," she added. "We were definitely planning the first time, but I can't plan the same wedding. I need to do something entirely different."

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