Since the premiere of Bravo's 'Real Housewives of Atlanta,' there has been widespread speculation over the identity of "Big Poppa," the mystery boyfriend of Kim Zolciak, one of the show's stars.

Turns out, Big Poppa is Lee Najjar, a very successful – and married – real estate mogul based in Atlanta. TMZ cameras were the first to capture images of Zolciak and Najjar on a romantic vacation at the Hotel Atlantis in the Bahamas last November.

Zolciak, a single mother of two, has always been mum on who was footing the bill for her extravagant lifestyle, but at the first season reunion special, her co-star NeNe Leakes let it be known that Big Poppa was very married.

"Keep your legs closed to married men," charged Leakes, who used to be friends with Zolciak.

Though Bravo has capitalized on the mystery of "Big Poppa," Najjar is seeking a low profile.

NeNe LeakesEarlier this year, he made an appearance on the MTV series 'Teen Cribs,' where his daughter, Katelin, and son, Jamen, gave a tour of their tricked-out mansion.

Najjar's wife – whose name is coincidentally Kimberly – also turned up in the episode, cooking spaghetti.

The spacious estate features a movie theater, music studio, beauty salon, game room, basketball court and countless other amenities. Najjar, who appeared in photos during 'Teen Cribs' alongside Jermaine Dupri and other celebrities, has no qualms about spoiling his children, particularly his daughter, as he notes on the MTV special. (SEE THE VIDEO BELOW)

"Katelin is our only daughter, and she is daddy's girl. She is my princess."

BV Newswire tracked down an exclusive photo of Najjar with mega-producer Dallas Austin taken May 16 at Austin's annual fundraiser.

Ironically, Austin is still letting the public know that he won't be helping Zolciak further her country music career anytime soon. Via his Twitter page, he recently wrote: "Don't ever put that house wives b***h in serious music convo please!!! It's unfair to real talented people. It was only for broken dreams TV!!"

Last year, Austin took to his MySpace page to say: "We are not doing a song, we are not doing an album ... that was only for television!"

According to a season preview of 'Housewives,' Big Poppa will make an appearance, and Grammy Award winner Kandi Burruss, the newest cast member, will work with Zolciak in the studio.

There is no word on whether Najjar and his wife are still together or whether he's back with Zolciak.