She's come a long way, baby! Eight years after making her on-screen debut on MTV's Laguna Beach, blonde bombshell Kristin Cavallari tackled her biggest role ever this week -- as a mom. The 25-year-old stunner gave birth to Camden Jack Cutler, who weighed in at a healthy 7 pounds, 9 ounces. Little Camden is the first child for the former Dancing with the Stars contestant and her fiance Jay Cutler, quarterback for the Chicago Bears. Cavallari announced the big news Wednesday via Twitter after giving birth, ""We are thrilled to welcome Camden Jack Cutler into the world," Cavallari, 25, wrote. "He was born this morning weighing 7 lbs., 9 oz. Everyone is doing great!" Motherhood obviously suits her. She gushed over the infant, saying, "Being a mom is the most incredible feeling. I am so in love with this little boy!" The child's arrival is somewhat of a miracle, considering Cavallari and Cutler called off their engagement and went their separate ways last year. However, not long after their split, the couple was seen out and about together. The engagement was soon back on, and Cavallari went public with her pregnancy in the beginning of the year.