Kim Zolciak Post Baby Body: Reality Star Claims She’s a Size 4 Only 9 Days After Giving Birth to Twins (PHOTO)

Kim Zolciak gave birth to her twins - a boy named Kane and a girl named Kaia- just nine days ago and is already showing off her post-baby body. The 35-year-old former "Atlanta Housewife" retweeted a picture her 16-year-old daughter Brielle posted that showed Zolciak showing off a much-smaller belly.

"How is my mom a size 4... it's been 9 days since she gave birth to twins," her daughter tweeted along with the picture.

Zolciak and her husband Kroy Biermann welcomed the two new bundles of joy last Monday, Nov. 25. She announced the news on Twitter writing:

"Guess what?!! The TWINS have arrived! We welcomed a baby GIRL and second a handsome little BOY! They are both healthy and Kroy and I are so thankful!!"

"We are officially the 'Biermann Bunch' now!!" she added.

A week before giving birth, the "Don't Be Tardy" star shared a picture on Instagram of her belly telling fans that her stomach was measured at 48-inches.

"The twins will be here this month and we are sooo excited and I'm sooo over being pregnant"! she tweeted at the time.

The couple already has two children together, Kroy Jr., 2, and Kash, 15-months. Zolciak also has two daughters from a previous relationship Brielle, 16, and Ariana, 12.

There hasn't been any baby pictures yet but did Zolciak did reveal why she and Biermann chose Kane Ren and Kaia Rose as the names for their babies.

"The twins name are: Girl - Kaia Rose after 'psychic' Rose whose like a grandma to me and been a huge part of my life for 13 plus yrs. Also the twins were born on Rose's birthday!" she wrote. "Boy - Kane Ren, Ren after my OBGYN who has delivered 5 of the kiddos, who has also been a big party of my life for 12 yrs and we simply adore him."

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