Kim Zolciak is reportedly expecting a second boy with husband Kroy Biermann.

The Real Housewives of Atlanta star recently announced she is pregnant with her fourth child.

And Star magazine claims that it will be all things blue for the reality show mother.

"They're so excited because Kim already had two girls and now that she's having a second son, the family will be balanced out with two of each," a source told the publication.

"[Kim] was trying to hide it, but she's showing a little already."

The blonde bombshell is already parent to Brielle, 15, and Ariana, nine, from her previous marriage.

Kim told Life & Style that she and her husband were "so excited" to be adding to their growing brood.

"To decide we wanted to get pregnant again and have it happen so quickly was such a blessing," she told the magazine.

Kim is currently four months pregnant with the Atlanta Falcons player's baby.

Kim, 33, and Kroy, 26, met in May 2010 and tied the knot in a lavish ceremony in November 2011.