Look at her glow!

Serena Williams slammed home her recent pregnancy news with this sweet post to instagram.

Along with this picture, the tennis champion penned a sweet caption to her baby to be writing, “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.”

Williams then ended the post with a nod to her baby daddy Alexis Ohanian’s birthday and a wink. Then added, “From the world’s oldest number one to the world’s youngest number one. – Your mommy”

Serena is referencing her #1 status in the tennis world, recently beating her sister Venus in the Australian Open final while pregnant which then sent the internet into a frenzy.

It’s clear this glowing mother to be still has that competitive fire and we’re looking forward to seeing if that “youngest #1 in the world” will be a boy or a girl!