Tennis star Serena Williams shared a special surprise on Snapchat Wednesday.

She posted the picture on Snapchat of her wearing a yellow one-piece swimsuit with the caption “20 weeks.”

The Snapchat has since been removed from her story.

But a spokesperson for the tennis star later confirmed that Williams is expecting baby in the fall.

Williams, 35, got engaged in December to Reddit co-founder Alexis Ohanian, 33.

Williams has 72 Women’s Tennis Association titles and most recently won her 23rd career grand slam, the most of any player in the Open Era. She hasn’t played in a tournament since beating her sister Venus in this year’s Australian Open women’s single final in January.