Kim Zolciak announced that she welcomed her twins with husband Kroy Biermann on Sunday.

Zolciak shared the news on Instagram, writing: "We are officially the 'Biermann Bunch' now! Guess what?!!! The twins have arrived! We welcomed first a baby girl and second a handsome little boy! They are both healthy and Kroy and I are so thankful!!"

She also shared the twins' names and the reasons for picking them via Instagram on Monday.

"Girl: Kaia Rose (After 'psychic' Rose who is like 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 then wrote: "Boy: Kane Ren (Ren after my OBGYB who has delivered 5 of the 6 kiddos, who has also been a big part of my life for 12 yrs and we simply adore him)."

PHOTOS: Kim Zolciak Shares Baby Bump

The reality star announced her fifth pregnancy during the season finale of Don't Be Tardy, when it aired on June 25. She took multiple home pregnancy tests and read the results from all of them at the same time. She later told E! News she is pregnant with twins, adding, "I couldn't be more excited."

She also flaunted her massive baby bump on Instagram at the request of her Twitter fans.

"Sooooo with all the request I finally decided to post My baby bump today! The twins will here this month and we are soooo excited and I'm soooo over being pregnant! #countingdownthedays," she wrote.

Zolciak and Biermann wed in November 2011 and welcomed their first son, Kroy Jagger "KJ" Biermann, on May 30, 2011. Kash was born a year later on Aug. 15, 2012. Her two daughters, Brielle and Ariana, are from a previous relationship.

In October, Zolciak shared a picture on Instagram of the couple's first encounter at a charity event in 2010 and revealed her due date. She captioned the photo: "The moment my life changed forever literally!! We have since welcomed 2 beautiful boys, expecting twins NEXT MONTH and Kroy is legally Brielle and Ariana's father! I live a dream! I'm beyond blessed and grateful!!! Your life can change in a second literally!!! Ask Believe and Receive!!"

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