As the royal wedding between Prince Harry and Meghan Markle inches closer, the world is getting a glimpse of the fine details.

Among those details: Prince William will likely serve as a de facto “Best Man” when Harry weds Meghan at St. George's Chapel at Windsor Castle in May.

However, according to British tradition, there is no such thing as a best man. Instead, Marlene Koenig, a European royal expert, told Town & Country that “the best man or best men are officially called supporters.”

But as Koening noted, “William will probably be Harry's supporter.”

Though the title may sound like a downgrade, a supporter completes all the usual tasks of a best man. As Harry did for William during his 2011 wedding to Kate Middleton, William will stand up in church beside his brother. And, William will likely be in charge of planning Harry’s “stag weekend,” the British version of a bachelor party.

Beyond William taking a role in the wedding, royal fans should expect to see Prince George and Princess Charlotte playing a part in the royal nuptials in May 2018.

“The wedding will be a family event,” a spokesperson for the Kensington Palace told The Sunday Times.

As for Meghan’s side of the aisle, she too may choose to break with British tradition and bring on a maid of honor just like the Duchess of Cambridge did when she asked her sister, Pippa Middleton, to play the role.

“The couple of course want the day to be a special, celebratory moment for their friends and family,” a Kensington Palace spokesperson recently told journalists. “They also want the day to be shaped so as to allow members of the public to feel part of the celebrations too and are currently working through ideas for how this might be achieved.”