updated 03/20/2012 AT 3:00 PM ET
•originally published 03/20/2012 AT 3:30 PM ET
She has an infant at home – and another baby on the way!
The reality star, 33, welcomed her first son, Kroy Jagger Jr., with NFL star Biermann, 26, in May 2011, and the couple tied the knot on Nov. 11, 2011. The ceremony was captured for her new Bravo reality show, Don’t Be Tardy for the Wedding, which is set to premiere April 26 (9 p.m.).
Zolciak has two daughters – Brielle, 15, and Ariana, 9 – from a previous relationship.
On Tuesday, she credited her girls for keeping her latest pregnancy quiet, Tweeting, “Thank you to @BrielleZolciak @arianazolciak & all our friends for keeping our pregnancy a secret u guys are the best!”
Life & Style first broke the news of Zolciak’s pregnancy.