Home Entertainment Celebrity Serena Williams, Fiancé Alexis Ohanian welcome baby girl! On 1 September, Serena Williams, 35, gave birth to a baby girl at a hospital in Palm Beach, Florida, a source told Us Weekly. Wochit September 2, 2017 23:31 IST Close On 1 September, Serena Williams, 35, gave birth to a baby girl at a hospital in Palm Beach, Florida, a source told Us Weekly.