Serena Williams shows off her growing baby bump in swimsuit (Photos)

Serena Williams kept her pregnancy under wraps until a few weeks ago when she accidentally let slip the happy news on Snapchat.

The tennis star, 35, is planning to keep us regularly updated on how it’s all going.

She posted a series of gorgeous snaps on her Instagram. In the pics, she’s posing on a boat in a black swimsuit – that bump proudly on display – with the sparkling ocean spread out behind her.

Although Serena left off any captions, it looks like the images were taken during her holiday with friends in Miami earlier this month.