updated 12/29/2012 AT 8:00 PM ET
•originally published 12/29/2012 AT 9:15 PM ET
Matthew McConaughey has spilled the beans about his new baby!
“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 Saturday night.
“He greeted the world at 9 lbs., and 21 inches. Bless up and thank you for your well wishes.”
Camila, 29, and her actor husband, 43, welcomed their third child in Austin, Texas, Friday, PEOPLE previously confirmed.