"Camila gave birth to our third child yesterday morning. Our son, Livingston Alves McConaughey was born at 7:43 a.m. on 12.28.12," he wrote on his WhoSay page. "He greeted the world at 9 pounds and 21 inches. Bless up and thank you for your well wishes."
This is the third child for the couple, who are already parents to Levi, 4, and Vida, 2. McConaughey, 43, and Alves, 30, have been together since 2006 and married in June.