A day of parades, street parties and now possibly protests.
That's what you get when you invite a ruler best known for violently crushing the pro-democracy movement in his country to your wedding.
It seems that the King of Bahrain received a fax from the Queen asking him to save the date for William and Kate's big day.
While St. James' Palace won't reveal which guests have RSVPd, the fact that King Hamad bin Isa Al Khalifa seems to have received an invite has left many questioning exactly how the royals came up with their guest list.
UN High Commissioner for Human Rights Navi Pillay issued a statement that she "was deeply alarmed by the escalation of violence by security forces in Bahrain ...and a blatant violation of international law."
Sounds like just the person you want perusing your registered gift list.
The anti-monarchy group Republic, who had previously said they would not protests on the wedding day, have sent letters to Prince William and Kate Middleton, demanding that the King of Bahrain have his invite revoked.
"I would ask the Windsors to spare a thought for those protesters who have been shot, arrested, tortured and killed," an organiser for Republic Graham Smith wrote in the Guardian. "Can you look those people in the eye and justify the invitation you have extended to their oppressors?"
"The inclusion of these dictators on a wedding invitation list that excludes democratic leaders from Europe and the US speaks volumes about the world view of the Windsor family. These are people who favour status over principle and "royalty" over legitimacy," the letter continues.
Users on Twitter were soon to react after news of the Kings possible wedding attendance spread.
"You know what really sickens me? The Bahrain royal family will be a Kate and Williams wedding," one user tweeted.
"Bahrain's king as a royal wedding guest? What a dreadful message Being 'royal' doesn't stop you being a violent," another added.