The teenage daughter of the billionaire couple behind the documentary “The Queen of Versailles” was found dead in her Florida mansion.

Victoria Siegel, 18, was found unresponsive Saturday at the home of parents David and Jackie Siegel, whose quest to build the largest single-family home in the country became the basis for the hit film, according to the Orlando Sentinel.

Victoria was found unresponsive at around 2 p.m. at the Seagull Island mansion on Green Island Cove, in Central Florida.

CPR was administered and the teen was taken to Health Central Hospital in Ocoee, where she was pronounced dead, according to the Sentinel report.

The medical examiner was still determining the cause and manner of death, cops said.

“Thank you all for your prayers and for your support,” Jackie Siegel posted on her Facebook page. “It is with great sadness that we ask you to respect our privacy during this tragic time and the loss of our beloved daughter, Victoria. As more information comes out the family will share it, until that time there is no comment.”

Victoria’s billionaire parents attempted to build “the biggest house in America” — complete with 13 bedrooms, a movie theater, bowling alley, arcade and roller-skating rink — but the building process was plagued by financial setbacks stemming for the 2009 economic crisis and the home was never completed.

Jackie Siegel appeared last week on an episode of ABC’s reality-TV show “Celebrity Wife Swap,” where she swapped with actress Juliet Reeves London, wife of “Party of Five” actor Jeremy London.

On the show, she admitted she had left most of her children’s parenting to nannies.

“I’m kind of baby-phobic,” she told the Sentinel. “I rarely changed my own kids’ diapers . . . We always had six nannies around.”

Patriarch David Siegel made his fortune as the founder of Westgate Resorts, a time-share company. Authorities said he was informed about the death of his daughter and will be making a statement in the coming days.

“The Queen of Versailles” followed the eccentric couple as they attempted to complete their gargantuan homestead.

Victoria made an appearance in the film as the oldest of the couple’s eight children.

“Nothing’s really normal about this life,” she was quoted as saying in the documentary.

This article originally appeared in the New York Post.