Cutler and his fiancee Kristin Cavallari welcomed a new baby boy Wednesday morning in Chicago.
Cavallari, the former star of "The Hills" and contender on "Dancing with the Stars," tweeted, "We are thrilled to welcome Camden Jack Cutler into the world."
"He was born this morning weighing 7lbs 9oz. Everyone is doing great!" the tweet said.
The pregnancy for the engaged couple was first reported in January.
Cavallari competed on "Dancing with the Stars" in the fall of 2011, and at time the two had broken their engagement, but they reconciled a couple months later.
The two told People magazine they "can't wait to meet the new addition to our growing family."