Prince Harry and Meghan Markle have just revealed their wedding date - May 19th 2018.
But Harry's brother Prince William has double booked himself on that very same day.
Not only will he be attending his little brother's wedding as best man, he's also expected to hand out the trophy at England's FA Cup Final on the same day!
The Duke of Cambridge has phoned Kensington Palace and the Football Association to work out how he can be at both events on May 19th.
Prince Harry's wedding to Meghan Markle is expected to start earlier on that day, and the FA Cup final starts at 5.30pm meaning William may be able to attend both events.
The FA released a statement saying: "Everyone at The FA is delighted for HRH Prince Harry and Meghan Markle with the announcement of their wedding at Windsor Castle next year," it read.
"Saturday 19 May promises to be a wonderful day such a special royal occasion being followed by English football's showpiece event, the Emirates FA Cup final at Wembley Stadium.
"With millions coming together to watch both events at home and around the world, it will be a day to celebrate."
Source: The Mirror