Dwayne “The Rock” Johnson Welcomes New Baby Girl! The 45-year-old actor posted an adorable photo on Instagram, celebrating his newborn baby girl, Tiana Gia Johnson. Dwayne Johnson, via Instagram Dwayne Johnson, via Instagram Dwayne Johnson, via Instagram This is Johnson’s second daughter with his girlfriend, Lauren Hashian. His oldest daughter, Simone Garcia Johnson, came from his previous marriage. Johnson and Hashian first announced they were expecting another child back in January. Congratulations!!