Serena Williams
Serena Williams is back to her pre-baby figure just weeks after giving birth to her daughter. Pictured: Williams attends Sports Illustrated Sportsperson of the Year Ceremony 2015 at Pier 60 on Dec. 15, 2015 in New York City. Getty Images/Theo Wargo

Serena Williams has already shed the extra pounds she packed on during her pregnancy.

On Thursday, Williams took to Instagram and shared a mirror selfie. In the photo, the no. 1 female tennis player in the world wore black shorts and t-shirt. She was noticeably back to her pre-baby figure. Williams, who just gave birth a few weeks back, did not add a caption to her snap.

Her followers could not help but notice how great she looks just weeks after welcoming her first child, with many commending the athlete for keeping her body in shape amid her pregnancy. "Wooow Look at that body already," one fan commented. "Looking Good," another one added. "Ready to dominate! Let's go," another user wrote in the comments.

Williams and her fiancé, Alexis Ohanian, welcomed a baby girl earlier this month. The athlete gave birth at a hospital in Palm Beach, Florida. After a week, Williams shared a photo of her baby on Instagram. "Meet Alexis Olympia Ohanian Jr. You have to check out link in bio for her amazing journey. Also check out my IG stories," she wrote in the caption.

Since welcoming her daughter, Williams admitted that just like other moms, she has become more interested in talking about or posting photos of her baby than herself on social medial. "I'm having a hard time posting about anything that does not involve Alexis Olympia or something to do with her," she wrote in a tweet.

Williams is not alone in showering her daughter with love and affection as her soon-to-be husband feels exactly the same. The Reddit co-founder shared a photo of baby Alexis last week on Instagram and gushed over his first child.

According to Ohanian, being a dad is the greatest experience for him. He likened entrepreneurship to a baby because business owners often call their startups "babies." Both are all-consuming and demand sleepless nights. However, his daughter is all that and more as he considers her his "legacy."

Since both Williams and Ohanian are first-time parents, the couple took advantage of online resources to look for parenting tips. The tennis player turned to Reddit for childbirth tips a few weeks before her delivery and asked when she should prepare her hospital bag and what should she put in it.

What can you say about Williams' post-baby body? Drop a comment below.