She’s hitting a grand slam on the 2017 Met Gala red carpet!

Pro tennis star Serena Williams was absolutely glowing at the prestigious event — and it’s all thanks to her current pregnancy with baby No. 1! The mommy-to-be stunned in a green gown as she debuted her growing baby bump on fashion’s biggest night.

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The 35-year-old athlete showed off her maternity style in an emerald green halter-top gown. The fabric was fitted and ruched at her waist, hugging her baby bump — and she was all smiles as she flaunted her new pregnancy curves with her fiancé, Reddit co-founder Alexis Alexis Ohanian, by her side.

serena william alexis ohanian met gala 2017 getty

(Photo Credit: Getty Images)

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Her baby bump debut comes just one month after she announced that she is currently expecting her first child on Snapchat — and she recently revealed that she shared her original post by mistake!

“I was on vacation, taking time for myself, and I have this thing where I’ve been checking my status and taking a picture every week,” she told Gayle King during an interview at the 2017 Ted Conference. “I’ve been just saving it, but you know how social media is — you press the wrong button and…”

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The vacation she mentioned was the one she took with Alexis, which served as a babymoon for the new parents-to-be. Serena documented their trip on Instagram and she shared another photo of her baby bump with a heartfelt message to her unborn child.

“You gave me the strength I didn’t know I had. You taught me the true meaning of serenity and peace,” she wrote in her caption on Instagram. “I can’t wait to meet you. I can’t wait for you to join the player’s box next year. But most importantly, I am so happy to share being number one in the world with you.”