Credit: Gene Page/ABC via Getty Images

Victoria Siegel, the daughter of David and Jackie Siegel — who were the focus of the 2012 documentary Queen of Versailles — has died at age 18.

A sheriff’s spokesperson said Victoria was found unresponsive in the family’s Windermere, Florida home on Saturday afternoon. A cause of death has not been determined. “It’s a sad case,” Orange County Sheriff’s Office spokesman Jeff Williamson said to PEOPLE.

On Facebook, Jackie confirmed Victoria’s death. “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. Thank you all for your prayers and for your support,” Jackie wrote. “As more information comes out the family will share it, until that time there is no comment.”

The Siegels’ life was at the center of Queen of Versailles, Lauren Greenfield’s critically acclaimed 2012 documentary. The film focused on David and Jackie as they attempted to build their private residence, called “Versailles,” amid the 2008 financial crisis. After the release of the film, David Siegel’s company, Westgate Resorts, sued Greenfield for defamation, but lost the case in 2014.

The Siegels, who have eight children, recently appeared on an episode of ABC’s Wife Swap.

For more, head to PEOPLE.