Victoria Siegel struggled with an addiction to prescription drugs prior to her death, a family representative said on June 8.

Victoria Siegel, the 18-year-old daughter of Queen of Versailles documentary stars David Siegel and Jackie Siegel, was found unresponsive at about 2 p.m. on June 6 by a housekeeper at the family compound on Green Island Cove in Windermere, Florida.

She was transported to Health Central Hospital where she was pronounced dead, according to the Orange County Sheriff’s Office. According to the family rep, the Siegel family was attending a wedding in Park City, Utah, when the incident occurred.

David and Jackie Siegel and their seven kids are “devastated and heartbroken by the loss of their beloved Victoria”.

The family’s representative said: “They are hurt, deeply wounded and they are grieving. Victoria was a beautiful spirit with a wonderful smile who was greatly loved, and will be deeply missed.” She “had a history of seizures and was prescribed medication for this condition. Unfortunately she became dependent and struggled with this condition. She voluntarily underwent rehabilitation and was working hard to address this problem,” the rep added.

David and Jackie Siegel had planned to return to Orlando on June 7, to begin a family cruise on June 8.

“David and Jacqueline were immediately notified and returned to Orlando the same day,” the family rep explained.

An autopsy had been performed and the cause of Victoria’s death is pending until other test results are received.

Autopsy reports could take about 10 to 12 weeks to complete.

The family rep also said: “It is likely that Victoria ingested one or more drugs prior to her death.”

“However, we cannot determine at this time whether or not the drugs she took were in fact prescribed medication, something else, or where and how these drugs may have been obtained.”

Jacqueline Siegel confirmed Victoria’s death via Facebook on June 7.

“The family is deeply appreciative of the outpouring of support that they have received and request that their privacy be respected while they mourn their loss,” the rep said.

The billionaire couple, David and Jackie Siegel, is best known for starring in Lauren Greenfield’s 2012 documentary, Queen of Versailles, which followed the couple as they built a second 90,000-square-foot mansion, called the Versailles House. The building could be finished by David Siegel’s 80th birthday in May 2016.

David and Jackie Siegel and their eight kids – including Victoria – most recently appeared on Celebrity Wife Swap on June 3.