The baby countdown is on for Serena Williams.
The tennis star stepped out Monday evening at the Met Gala in New York City, fully showing off her baby bump for the first time since announcing her pregnancy on April 19.
Williams and fiancé Alexis Ohanian, 34, will welcome their first child this fall, her rep confirmed to PEOPLE last month following an accidental post the athlete made on Snapchat before quickly deleting.
“20 weeks,” the mom-to-be captioned a mirror selfie, where her baby bump was clearly visible underneath a La Blanca Anniversary Suit created in a custom yellow especially for Williams.
Williams confirmed the news herself on Instagram a few days later, writing a heartfelt tribute to her unborn child alongside a beach selfie.
“My Dearest Baby, You gave me the strength I didn’t know I had. You taught me the true meaning of serenity and peace. I can’t wait to meet you. I can’t wait for you to join the players box next year,” she captioned the photo.