Serena Williams and Alexis Ohanian welcome a baby girl

Tennis star Serena Williams

Tennis star Serena Williams has given birth to a baby girl with fiance Alexis Ohanian. Baby girl arrived Friday, September 1 at St. Mary's Medical Center in West Palm Beach, Florida, weighing in at 6 lbs., 13 oz., according to a Tweet from WPBF-25 news producer Chris Shepherd.

World number one Rafael Nadal took to Twitter to send his wishes as he wrote, 'Congrats Serena!!! So much joy for you!!!'

Beyonce posted a photo of Williams during her pregnancy with the caption 'Congratulations Serena!'

Serena announced her pregnancy on Snapchat back in April, showing off her bump in a swimsuit while captioning the image: '20 weeks'