SportsTennis Serena Williams And Fiancee Welcomes Baby Girl By Busybuddies - September 1, 2017 Facebook Twitter Google+ Pinterest WhatsApp Former world number one, Serena Williams and Reddit co-founder Alexis Ohanian has welcomed their first child, a baby girl. 35-year-old Serena gave birth to a baby girl weighing 6 pounds, 13 ounces, according to her hospital sources.