Princess Eugenie
Princess Eugenie's family will pay for most parts of her wedding. Pictured: Princess Eugenie attends a Christmas Day church service at Sandringham on December 25, 2016 in King's Lynn, England. Getty Images/Chris Jackson

Princess Eugenie is most likely working with wedding experts in preparation for her big day on Oct. 12.

Debrett’s, a high society company that claims to be an authority on wedding etiquette, detailed some of the things that royals should ahead of their weddings. For instance, Debrett’s noted that the bride’s family is the one responsible for paying for the wedding dress and everything that she will wear on her big day.

The parents of the bride are also tasked to pay for the outfits of the bridesmaids and pageboys. Since Princess Eugenie is a member of the royal family, her parents, Prince Andrew and Sarah Ferguson, are also in charge of paying for the flowers in the church, the reception venue, and decoration.

Cake, catering, drinks, and entertainment, also fall into the hands of the bride’s family. But this doesn’t mean that groom has nothing to cover. He is the one who will pay for his wedding attire, the clothes of his best man, and the outfits of the ushers. He will also shell out some cash for the wedding and ceremony fees. The engagement ring is also shouldered by the groom.

Following the wedding reception, the bride and groom typically head to a hotel for their alone time. The cost of the room is also covered by the groom.

However, there are also some exceptions to the rule. For instance, Prince Harry’s family paid for everything for his wedding with Meghan Markle, and the formet actress didn’t shell out any cash. Prior to their nuptials, Kensington Palace released a statement to the public.

“As was the case with the wedding of the Duke of Cambridge and Duchess of Cambridge, the Royal Family will pay for the core aspects of the wedding, such as the church service, the associated music, flowers, decorations, and the reception afterward,” the statement read.

Aimee Dunne, a British wedding planner, estimated the royal couple’s wedding at over $643,000. E! News’ royal expert, Melanie Bromley, estimated Markle’s wedding dress alone to cost hundreds of thousands of dollars.

“It’s going to be featured in history books so needs to stand the test of time,” Bromley told Harper's Bazaar.