Serena Williams shows off post-baby weight loss as she slips back into jean shorts 2 weeks after giving birth

Day-Um, Mama! Serena Williams showed she’s serious about getting back into shape and back on the court on Saturday. The 35-year-old tennis pro shared a mirror selfie of her impressive post-baby body on Snapchat.

MORE: Serena Williams' Newborn Daughter Adorably Flexes Her Muscles in Her Sleep: 'Biceps'

“Back in my jean shorts 2 weeks,” Williams captioned the pic.

In the shot, she’s working her jean shorts with a white and black top. 

Serena Williams post-baby body
Photo: Snapchat

Williams and her fiancé, Alexis Ohanian, welcomed their daughter, Alexis Olympia Ohanian, Jr., two weeks ago, and already, the little girl is a social media star.

The Reddit co-founder, 34, created an Instagram account for his daughter, and in less than three days she got more than 35,000 followers.  

Biceps 💪🏾

A post shared by Alexis Olympia Ohanian, Jr. (@olympiaohanian) on

WATCH: Serena Williams Shares First Pic of Baby, Reveals She Faced 'a lot of Complications' During Delivery

“Biceps,” the caption for one post reads. The photo features baby Alexis with her arms up in a onesie that reads, “Smart and Strong like my Mama.”

21 PHOTOS
Shocking celebrity weight-loss transformations
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Shocking celebrity weight-loss transformations

Khloe Kardashian in 2012

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Khloe Kardashian in 2016

Hard work does pay off! The youngest Kardashian sister is obsessed with exercising and documents all her workout sessions on social media.

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Lena Dunham in 2015

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Lena Dunham in 2017

The "Girls" star lost a significant amount of weight after going on a holistic diet to help alleviate symptoms of endometriosis. 

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Mama June in 2013

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Mama June in 2017

The "Honey Boo Boo" star documented her weight loss journey on her very own reality show! She is now down to a size 4 -- and she looks incredible!

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Wendy Williams in 2012

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Wendy Williams in 2017

The TV personality revealed in 2015 that she lost 50 pounds over the course of three years with a healthy diet that doesn't include refined sugars, meat, dairy or "eating after dark." It looks like she's been committed to the strict diet. She looks better than ever in 2017!

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Ricki Lake in 2010

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Ricki Lake in 2011

The actress lost 20 pounds when she appeared on "Dancing With the Stars" in 2011.

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Jordin Sparks in 2008

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Jordin Sparks in 2017

Hard work pays off! "American Idol" alum began her weight loss journey by walking around her neighborhood and the rest was history! Her favorite workout? Zumba.

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Sara Rue in 2003

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Sara Rue in 2016

The "Rules of Engagement" star is a total fan of Jenny Craig for its simplicity. She looks incredible and totally glowing!

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Jonah Hill in 2014

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Jonah Hill in 2017

Talk about a transformation! Hill has lost weight and gained weight through the years -- depending on the movie he's working on -- but his latest transformation is absolutely jaw-dropping.

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Christina Aguilera in 2012

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Christina Aguilera in 2013

Smoke show! The songstress dropped 20 pounds over the course of one year. Doesn't she look incredible?!

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Miranda Lambert in 2012

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Miranda Lambert in 2013

The country crooner slammed critics who accused her of having weight loss surgery. She revealed that she dropped the pounds the old-fashioned way -- eating right and working out with her trainer!

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