A short statement from her representative said: "I'm happy to confirm Serena is expecting a baby this Fall".
The 23-time major victor posted a selfie of a small baby bump with the caption "20 weeks". Hell, she even competed in the Australian Open and won her seventh title in the tournament while pregnant.
Now, at 20 weeks pregnant, the actress-fashion-designer-and-champion will be a mother for the ages.
The tennis legend, who is also known as a big fan of Beyonce, is engaged to mogul and Reddit co-founder Alexis Ohanian.
The world No 2 shared an image of her on Snapchat posing in a mirror and wrote "20 weeks".
Though the two haven't confirmed baby rumors, should they choose to offer up pictures to the media, they could likely rake in some serious cash. She has just two wins in 21 head-to-head meetings with rival Williams. The announcement left the sport's chattering class wondering to what degree she was looking ahead to life after tennis.
"He's incredibly - a really nice person", she told the Daily Mail.
It would be perfectly safe for Williams to continue with rigorous training throughout pregnancy, but how quickly she would return to tournament tennis, if she so chooses, was uncertain, the researchers said.
A new little athlete appears to be on the way for Serena Williams and her fiance Alexis Ohanian.
Serena Williams, tennis superstar and Sports Illustrated athlete of the year, seems to have announced her pregnancy in a post to her story in Snapchat. And the older I get, the more I'm like, 'I'm too young!' She added that Williams will not play again this year but was looking forward to doing so in 2018. Another former No. 1 and major champion, Victoria Azarenka, has announced she'll be getting back on tour after having a baby a year ago.
Then, there are some tweets expressing concern over the fact that Williams was still playing tennis.