The blonde gave birth to son Kroy Jagger, her first child with her fiance, Atlanta Falcons footballer Kroy Biermann, on Monday (30May11).
Announcing the happy news on Twitter.com, Zolciak writes, "@biermann71 and I are happy to announce the birth of our son today. Kroy Jagger Biermann is healthy & beautiful. We are so in love!"
The Real Housewives of Atlanta star Zolciak already has two daughters - Brielle, 13, and nine-year-old Ariana - from a previous relationship.