Credit: Earl Gibson III/Getty Images

Real Housewives of Atlanta star Kim Zolciak has a brand-new reason to party: She's expecting another bundle of joy!

"I'm three months pregnant," she told Monday. "I'm really, really happy and excited!"

The baby-to-be's dad is Atlanta Falcons defensive end Kroy Bierman, 25, whom Zolciak, 32, befriended at an Atlanta charity function earlier this year. (Their first meeting was documented on a recent episode of Bravo's hit.)

As show fans know, "Tardy for the Party" singer Zolciak already has two daughters, Brielle, 13, and Ariana, 9.  Will Zolciak and Bierman find out the gender of their little one? "Probably," she told Us. "My psychic did say i'm gonna have a boy!"

Zolciak also confirmed that she put  her Atlanta townhouse for sale (first reported at DishintheDirt.) "We need to move into a bigger home!" she explained of her growing family.

Zolciak's Atlanta housewives castmate Sheree Whitfield also spoke to Us about her pal's baby news. "I think it's wonderful!" Whitfield said. "I don't think I've ever seen her so happy. As long as she's happy, i'm happy!"