Saudi Crown Prince Mohammed bin Salman caused “chaos” ahead of a wedding by booking out a huge swath of the Plaza Hotel and booting more than two dozen wedding guests — including the happy couple — out of their rooms.

We hear the prince bought out the majority of the famed hotel despite the grooms-to-be, Noble Black and Marc Rozic, having snagged their guests’ luxury digs 15 months in advance.

Just one week before the party was due to check in, more than two dozen guests were displaced, and booked into the Four Seasons and the Pierre instead. The good news: the Plaza comped their bill, which we are told would have come to around $15,000.

According to our insider, Plaza event planner Emily Reifel couldn’t have been better at breaking the news. “She met with one of the guys with a breakfast out of ‘Pretty Woman’ with champagne and strawberries. It was all done very nicely.”

The wedding — which was still held at the Plaza — even got insurance against crashers. “The prince had security every 5 feet at every corridor,” says a source. Getting to the Plaza on the big day also proved an adventure. “Everything was blocked off over a several-block radius,” we’re told.

“Who would have ever thought that a Saudi crown prince would inadvertently sponsor a gay wedding?” Black, a top Douglas Elliman broker, tells us. “Although it was nerve-racking in the beginning, the prince ended up giving us the best present ever — a truly unbeatable wedding story. Once we were all upgraded to royal suites in the Four Seasons and the Pierre, with no bill, we were all smiles, so we have nothing but thanks to the prince for his generosity.”

Guests included Elliman CEO Dottie Herman and chairman Howard Lorber, Sonja Morgan and Shannen Doherty.

Some noticed the crown prince popping his head in to see the celebration.

The wedding took place in March, but 2,000 wedding photos were just delivered.

During his buzzy tour of the US, Bin Salman also famously booked out the entire Four Seasons in LA — and didn’t even stay there.