Atlanta is about to get less blonde and bewigged.

After four years as a cast member on Bravo's Real Housewives of Atlanta, original costar Kim Zolciak **is giving up her status as one of Georgia's most noted reality stars.

Though she appears -- seven months pregnant -- in a handful of episodes during RHOA's fifth season, Zolciak, 34, will exit the series midseason, an insider recently confirmed to Us Weekly. And as the source explains, the mom of four's exit is far from graceful.

"Kim has a total blowout with production," the source hints of Zolciak. Over brunch in an upcoming episode (shot in June), costar Cynthia Bailey invites the women to Anguilla to witness her wedding vow renewal with husband Peter Thomas. But Zolciak, then heavily pregnant and unable to travel, has words with production, and the discussion escalates into a full-scale argument.

"Kim was furious!" says the insider. As a result, her storyline was phased out. (Indeed, Bailey confirms: "We don't see much of Kim this season. She's doing her own thing.")

Once famous for chardonnay-fueled fights on the Bravo series -- including a memorable spat during which ex-cast mate Sheree Whitfield yanked her wig -- Zolciak tells Us Weekly her priorities have changed.

"I want positivity around me," says Zolciak, who married Kroy Biermann, the father of her two sons Kroy Jagger, 17 months, and Kash, 3 months, in November 2011. (She also has daughters Brielle, 15, and Ariana, 10, from previous relationships.)

Documenting her wedding to Biermann in a 2012 Bravo spinoff Don't Be Tardy for the Wedding, Zolciak has another series in the works, according to Us Weekly's source -- and until then, Zolciak is just fine with keeping her distance from the Atlanta crew.

"With these ladies, I feel like nine times out of 10, there's going to be an argument," she tells Us. "They're not happy for me. They're not supportive."

Tell Us: Will you watch Real Housewives of Atlanta without Kim Zolciak?

This article originally appeared on Usmagazine.com: Real Housewives of Atlanta: Why Kim Zolciak Is Leaving the Show