Prince William makes unexpected appearance with Travis Kelce hours before Taylor Swift's wedding

Travis and Jason Kelce just announced the latest guest on their New Heights podcast - and fans are losing their minds.

The NFL star brothers may have just secured the collaboration of the century, as they’ve managed to get none other than British royalty, Prince William, to appear in a special episode.

Not only that, but the podcast instalment is due to drop today at 12pm ET, which is 5pm in the UK, and more importantly, the day Taylor and Travis are reported to be getting married at Madison Square Garden.

The shock announcement was made on the New Heights Instagram account on Friday (3 July) with a teaser video alongside the caption: “London’s Calling.”

In the video, Jason excitedly announced: “Our guest today is the 6”3 prince from London, England.

“That’s right, the President of the English Football Association, the Vice Royal Patron of the Welsh Rugby Union, the Duke of Cambridge, the Duke of Cornwall, the Lord of the Isles, Prince and Great Steward of Scotland, Earl of Chester and the Prince of Wales!”

Jason then goes on to shout, “Ladies and gentlemen, please welcome His Royal Highness, Prince William!” as Travis claps in the background and William pops up on the screen, wearing a pair of headphones.

The Prince of Wales laughed as he said, “That is quite an intro, guys, amazing,” and Jason replied, “We had to do it big for ya!”

It’s safe to say that this was a crossover that literally no one was expecting, but everyone can’t wait to see unfold.

Fans wrote in the Instagram comments: “You guys have outdone yourself. Can’t waittttt” and “This is gonna be epic”.

A second gushed: “Never would have expected it, so proud of everyone at new heights,” while a third added: “LOL THIS IS INCREDIBLE”.

Other shocked fans reacted with: “WHAT THE HELLLLLL OH MY GOD!!!!!!!” and “WHAT THE HECK!!! The last person I would have expected!!! Incredible!”

Meanwhile, someone else added: “This is actually the most iconic thing they could’ve done today, and they did it.”

Although William and his wife Kate Middleton are reportedly not attending the NYC wedding, the royals have met up with Tay and Trav before, which may be how this unexpected collaboration came about.

Last year, the Prince of Wales attended Taylor’s Era’s Tour at Wembley Stadium in London, with his children, Prince George, 12, and Princess Charlotte, 11.

After the show, they met up backstage and snapped a selfie that broke the internet, with Travis later recalling the experience on the podcast.

He said at the time: “We met royalty, guys. There was royalty at the show. I got there early and got to meet Prince William. How bout that? Your Royal Highness."

The sports star described the Prince of Wales as the 'coolest motherf**ker,’ while Jason then chimed in: "He was awesome. He was a good dude."

Travis added: "He was there with little George and Charlotte, and they were an absolute delight to meet.”

We’’ll be waiting with our popcorn ready for the episode to drop!