Kristin Cavallari is a mom! The 25-year-old reality star gave birth to her first child today with fiance Chicago Bears quarterback Jay Cutler, and tweeted the good news. "We are thrilled to welcome Camden Jack Cutler into the world," she wrote. "He was born this morning weighing 7lbs 9oz. Everyone is doing great!" What a New Jersey name for the California star! Congratulations to the new parents. See more celebrity moms in the gallery.