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. By Staff Reporter September 2, 2017 23:31 +08 Close IBTimes UK On 1 September, Serena Williams, 35, gave birth to a baby girl at a hospital in Palm Beach, Florida, a source told Us Weekly.