Serena Williams is pregnant! The tennis champion, who is engaged to Reddit co-founder Alexis Ohanian, revealed the exciting news in a now-deleted Snapchat post on Wednesday with a photo of herself posing in a yellow one-piece with her growing baby bump on full display. She captioned it simply, "20 weeks." The exciting news may come as a bit of a surprise to her fans, since she posted a photo of her friend Kelly Rowland's new parenting book on Instagram just last week with the caption, "One of these days I hope to apply this (but for now I'll stick to my dog Chip)." Serena and Alexis got engaged in December, and she recently shared a rare photo of them showing PDA on the beach.