Taylor Swift's boyfriend talks about THAT Royal selfie and says Charlotte and George were 'an absolute delight' before burnishing Prince William's street cred by branding him 'the coolest motherf*****'

Taylor Swift's boyfriend Travis Kelce has spoken about the iconic Royal selfie the couple took during the Eras Tour, branding Prince William the 'coolest motherf*****' and describing Princess Charlotte and Prince George as 'an absolute delight'.

Travis and his brother Jason Kelce opened up about the moment they met the Royals backstage on the latest episode of their podcast.

Speaking of the special experience, the Kansas City Chiefs tight end praised the Prince as being 'so cool' and 'awesome', but admitted he wasn't sure if he was supposed to 'bow to them' or shake their hand.

The Kelces met Prince William and his two eldest children George and Charlotte on June 21 at one of Swift's sold-out shows in London as part of her record-breaking tour.

In the latest episode of their New Heights podcast, the brothers detailed the encounter and raved about the Prince's humility.

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

'Dude, he was the coolest motherf*****,' he added. 'He was so cool.'

'He was awesome,' Jason echoed his brother's sentiments. 'He was a good dude.'

Jason and Travis also laughed about not knowing the proper etiquette upon meeting the royals. 

Travis then quipped on the difference in formality between the UK and the United States.

'He was there with little George and Charlotte, and they were an absolute delight to meet,' said Travis. 

'I wasn't sure if I was supposed to bow to them - courtesy [or] just be an American idiot and shake their hand. [Or say:] "Sup dude?''

'We wanted to be polite, especially on this side of the pond,' he continued.

'We did get a warning because, honestly, we don't know the actual [etiquette],' Jason said in response.

'Because we weren't at an elegant, official royal event, we didn't have to bow,' the former Philadelphia Eagles center shared. 'If it would've been an official meeting-of-royalty event, then it would have been that.'

Furthermore, they joked about how Jason, a former Super Bowl champion, felt emasculated after meeting the Prince. 

Travis then laughed about how his older brother - and fellow investor in Garage Beer - put his alcoholic beverage away for the important meeting.

'I did still address him as your Royal Highness, and I've never felt emasculated, and I did,' Jason said, laughing. 'That was the closest I've ever been.'

'I've never seen you give someone that much respect,' Travis joked. 'You put your beer ten feet away from you.'

'I didn't have it in my teeth when I met him,' Jason continued. 'They were wonderful people, and that's what it's about. They're part of a monarchy [it's] hard to be a down-to-earth human being - I would assume. But [they] came off that way completely.'