Taylor Swift’s boyfriend Travis Kelce has praised Prince William and made a special shout out to his “adorable” daughter Princess Charlotte..

Last Friday, the American footballer met the royal pair along with Prince George backstage at Swift’s sold-out Wembley concert where they chatted and all took an epic group selfie which has since gone viral.

Describing the much talked about moment, Kelce, who also made a surprise on-stage appearance during Swift’s show, said: “He [Prince William] was the coolest motherf*****.”

“They were an absolute delight to me,” he continued about the royal trio on his podcast New Heights, co-hosted with his brother Jason Kelce. “I wasn’t sure if I was supposed to bow to them or curtsy, or just be an American idiot and shake their hand.”

Kelce made special mention of Charlotte, nine, as the standout of the meet and greet, saying, “The highlight was Princess Charlotte. Prince George was great too, but she was so f****** adorable. I cannot express how much of a superstar she was.”

The NFL champ, who also revealed that he was advised before meeting the family that he should not bow to them since it was an informal meet-up and not an official one, also commended Prince William’s parenting.

He noted that Charlotte, who looked in her element in the two snaps taken, was encouraged by her father to be “present and vocal”. He revealed that she also asked a fair few questions during the group’s interaction.

In addition to his royal encounter, Kelce shared that he was very impressed by what the capital has to offer. “The beers, they’re a little bit tastier over here [London]; they’ve been doing it for a little bit longer, it does taste really nice over here,” he said.

He also seemed to have done a mini-tour, adding: “The scenery is awesome, it kind of switches depending on which part of London you’re in, and I like that.”

His biggest endorsement was his insistance that the only team he would leave the Kansas City Chiefs for would be one based in “awesome” London as the city is “awesome”.

Swift’s record-breaking Eras Tour hit London on June 21, 22 and 23 and saw a host of other big name attendees, including Hugh Grant and Tom Cruise. She will be back to perform in the city, possibly with Kelce in tow, on August 15, 16, 17, 19 and 20.

On night three, Kelce joined his US pop star girlfriend on stage dressed like one of her backing dancers, whipping the crowd of almost 90,000 into a frenzy.

It was the first time the sports star appeared on stage, while his brother Jason, who also attended, revealed the shows in London marked the first time he had seen the singer perform live.