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Kristin Cavallari, Jay Cutler

Charlie Luciano/startraksphoto.com

Congratulations to new mom Kristin Cavallari!

The former Hills star and fiancé Jay Cutler welcomed their first child, a son, Wednesday morning, she announced on Twitter.

"We are thrilled to welcome Camden Jack Cutler into the world," the 25-year-old wrote. "He was born this morning weight 7lbs 9oz. Everyone is doing great!"

The reality star and her Chicago Bears quarterback beau, 29, announced they were expecting this January. In May, one of Cutler's teammates accidentally revealed that the athlete and his fiancée were expecting a baby boy.

We can't wait to meet the little guy!