Congratulations are in order for former Real Housewives of Atlanta star Kim Zolciak, who just gave birth to healthy twin babies on November 25, 2013! The 35-year-old reality TV goddess announced the news on her Instagram page early this morning, revealing that she and hubby Kroy Biermann first welcomed a baby girl followed by a boy — which means Ariana, Brielle, KJ, and Kroy have both a little sister and a little brother!

"Guess what?!!! The TWINS have arrived!" Kim gushed. "They are both healthy and Kroy and I are so thankful," joking that her family is now the "Biermann Bunch."

Kim, who just celebrated her two-year wedding anniversary with Kroy earlier this month, also revealed the names of her new bundles of joy — which she's actually had picked out for years. And, of course, they start with the letter K! Click here to see what she named her twins.

Stay tuned to Wetpaint Entertainment for all the latest on Kim and Kroy's new twin babies. And in the meantime, be sure to hop on Twitter to send your well wishes to the hot new mama — and urge her to post pictures ASAP!

Are you surprised that Kim had a boy and a girl? Leave your thoughts in the comments below!