Pregnant Serena Williams hangs out with Mariah Carey and her twins after concert -- see the pic!


Serena Williams is very pregnant and on the move.

On Thursday night, the 35-year-old tennis pro showed up to see Mariah Carey perform in Fort Lauderdale, Florida, and greeted the singer backstage, along with her 6-year-old twins, Monroe and Moroccan.

WATCH: Serena Williams' Fiancé Alexis Ohanian Reveals the Awesome Reason They Think Their Baby Is a Girl

"With the beautiful @serenawilliams backstage tonight," Carey captioned a pic of herself and her kids posing with Williams.

With the beautiful @serenawilliams backstage tonight 😘

A post shared by Mariah Carey (@mariahcarey) on

Carey opened for Lionel Richie at the concert, and Williams -- who went to the show with her mother, Oracene Price -- was sure to Snapchat her love for their performances. The mom-to-be thoroughly enjoyed seeing the 47-year-old diva crooning "We Belong Together," and had an all-out singalong when Richie hit the stage.

MORE: Serena Williams on the 'Scariest Thing' About Becoming a Mom and How Giving Birth Will Make Her a 'Real Woman'

Williams has been keeping busy in lead-up to the birth of her first child with fiance Alexis Ohanian. Last week, her friends threw her a '50s-themed baby shower, and they got all dressed up for the occasion.

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Serena Williams' pregnancy Instagrams
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Serena Williams' pregnancy Instagrams
@vanityfair
Poster in background....
@vanityfair texture #annielebowitz Must read article. Link in bio
Wimbledon got me like: Easy standing drills this morning. Go easy.
@benstiller stiller Sorry, White. Average Joes for life! And that goes for both of us. Omaze.com/Joe
Must read article. Link in bio
My Mom
Hey everyone! Ok so signature collection is avail on @HSN tonight at 9pm tune in. This dress and more u have to tune in. So excited that I'm dancing!! 💃🏿💃🏿 @serenastatement
Mood lol
Yesterday's board meeting really went well. I am beyond excited to be official in Silicon Valley and be a part of the SurveyMonkey Board. Thanks to Zander, @sherylsandberg and everyone at SurveyMonkey. Diversity. New ideas. Challenge ourselves to be the best. #embracetheanswer
Had the best time at Disney, Pandora was unreal!!#visitpandora
Fun day out and about with @audemarspiguet
Thanks @newyorkpalace for an unforgettable stay. Until next time❤️ #lottenewyorkpalace
Watch: the Diamond outrage by one of my partners @audemarspiguet Dress @donatella_versace @versace_official earrings: @xivkarats overall: LOVE
About date night..
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. But most importantly, I am so happy to share being number one in the world with you.... once again today. On @alexisohanian bday. 😉 from the world's oldest number one to the world's youngest number one. -Your Mommy
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