"[Kroy] and I are happy to announce the birth of our son today. Kroy Jagger Biermann is healthy & beautiful. We are so in love!" she tweeted on Tuesday.
The "Tardy for the Party" singer and Biermann, a 25-year-old football player for the Atlanta Falcons, have been dating for just over a year. Zolciack has two daughters, Brielle, 13, and Ariana, 9, from a previous marriage.