World number two, Serena Williams, has taken to social media to announce she is pregnant.
The 35-year-old posted a picture of herself on Snapchat posing in a mirror with the message: "20 weeks".
This means that Serena, who won a record 23rd Grand Slam in Australia this January, will miss most of the remaining tennis season.
These include three Grand Slams: the French Open, Wimbledon and US Open.
US Open Tennis responded to Williams' message by saying: "@serenawilliamswill have a new pride & joy to hug and call her own soon! Congratulations on the exciting baby announcement!"
The tennis star is engaged to Reddit founder, Alexis Ohanian.
See the photo below:-