Ready for their debut! Kim Zolciak introduced her twins for the first time via social media on Thursday, Jan. 2. The former Real Housewives of Atlanta star couldn't help but gush about her son and daughter, whom she welcomed with husband Kroy Biermann in November.

PHOTOS: Stars with twins

"Baby Kaia up close!" the 35-year-old mom wrote, alongside a picture of the little one on Instagram. "She looks just like Brielle did!!" She also shared a photo of her son, writing, "Kane's close up!! My life this morning KJ is soooo in love Kane weighs 10lbs he is my little 'tank.'"

PHOTOS: Former Real Housewives stars

In the photos, Zolciak's baby girl Kaia kept her eyes shut tight as she opened her mouth for a big smile. The little bundle of joy also donned an adorable pink hat. Brother Kane, meanwhile, slept peacefully as the star's 2-year-old son KJ sweetly kissed him on his forehead.

Zolciak and her NFL player husband welcomed their newborns on Nov. 25. "We are officially the 'Biermann Bunch' now!" she announced via Instagram. "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!!" Zolciak tweeted at the time. Nine days later, the blonde stunner showed off her size 4 post-baby body.

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The couple -- married since November 2011 -- are already parents to KJ and Kash, 13 months. Zolciak is also a mom to daughters Brielle, 16, and Ariana, 12, from previous relationships.

This article originally appeared on Kim Zolciak, Former Real Housewives of Atlanta Star, Introduces Twins Kane and Kaia: Pics