The reality star and her Chicago Bears quarterback fiancé welcomed a son early Wednesday, Aug. 8, the proud new mom Tweeted.
"We are thrilled to welcome Camden Jack Cutler into the world," Cavallari, 25, writes. "He was born this morning weighing 7 lbs., 9 oz. Everyone is doing great!"
Although thrilled with their pending arrival, Cavallari admitted the pregnancy wasn't exactly planned.
In January, the couple confirmed they were expecting their first child.
"We left it up to fate. I knew there was a possibility, but I was really excited," she told Glamoholic. "Even if you are trying, just to see a positive result is shocking!"