Princess Eugenie’s fiancé Jack Brooksbank will most likely not sign a prenup ahead of the royal wedding.

Katie Nicholl, a royal biographer, claimed that prenups are simply not done among the members of the royal family. Even though three of Queen Elizabeth II’s children have gone through divorces, none of them considered signing a prenuptial agreement.

It is also believed that Prince William and Prince Harry didn’t sign the document before they married Kate Middleton in 2011 and Meghan Markle earlier this year, respectively.

“I don’t think members of the royal family sign prenuptial agreements. It’s commonplace with celebrity marriage, but this is not a celebrity marriage, it’s a royal marriage,” she told Town & Country.

Duncan Larcombe, the author of “Prince Harry: The Inside Story,” said that there’s no need for such an agreement because the royal family’s fortune belongs to the Queen.

“You wouldn’t need a prenuptial agreement to stop Windsor Castle from being cut in half in the event they divorce,” he said.

As of late, prenuptial agreements are not also legally binding in England so it is not necessary for members of the royal family and their spouses to sign them. All matters of divorce are also handled outside the courtroom and are settled behind closed doors.

In related news, Princess Eugenie and Brooksbank are scheduled to tie the knot at St. George’s Chapel in Windsor Castle on Oct. 12. Taxpayers are expected to shoulder some parts of their nuptials. Originally, the cost of the royal couple’s wedding was estimated between $650,000 to $1.3 million, but these figures have since increased to over $2.5 million.

A source previously claimed that Prince Andrew wanted to go all out for his daughter’s wedding.

“The Duke of York has insisted his daughter’s wedding must be a huge occasion to be remembered and wants everyone to get on board to celebrate the happy couple,” the source said.