Taylor Swift fans think Travis Kelce dropped huge easter egg for his debut on stage months before

It's been three days now since Taylor Swift brought out Travis Kelce as an extra special surprise guest during her London show on Sunday (23 June).

Now, Swifties have already gone absolutely feral after she brought her boyfriend Travis up on stage, 'working out' what he said to her during the Eras Tour bit, the incredible subtle detail in his outfit, his super sweet gesture in the VIP tent after his performance and, especially, following Dave Grohl's accusations that she doesn't perform live.

And now, fans of the 34-year-old 'Cruel Summer' singer are convinced the NFL star dropped a huge easter egg for his debut on stage months beforehand.

One X user penned: "@tkelce told us he was most looking forward to her London shows! They’ve been planning this for a while, huh? #LondonTSTheErasTour."

A second quipped: "Guys I think Travis and Taylor knew he was going on stage because in that interview he said he was most excited for the London shows."

"Remember when Travis said we didn’t want to miss the London shows? We knew this WE would be crazy but THAT crazy???" pointed out a third.

Fans were buzzing to see Travis Kelce take to the stage with Taylor Swift on Sunday (23 June). (Gareth Cattermole/TAS24/Getty Images for TAS Rights Management)

A fourth echoed: "Remember Travis said the London shows were the ones he was most excited for and would be the most fun?

"Almost like he knew he was gonna have a role in them? Almost like this whole little display has been planned for quite awhile now?"

"Ah, that’s why Travis recommended the London stage shows as being electric, he knew what was up tonight," speculated a fifth.

Another echoed: "Just remembered he said the London shows would be ones to watch.

"You ain’t slick, Travis. You knew they would cause a worldwide Swiftie spiral."

And a final X user added: "This is why Travis was looking forward to the London shows!!! He knew it all along."

Speaking to ET about Taylor back in April, Travis gushed about the pop icon and opened up on exactly how he 'supports' her throughout her career.

Travis praised Taylor for being so 'amazing' at what she does. (Michael Owens/Getty Images)

"It's definitely been fun to experience her taste in music, for sure," he began.

"She's so amazing at what she does. And to find that creativity to see where she likes to pull things from and just, really, how she listens to music is very eye-opening for me. It's been fun to hear her take on it."

Clearly a Swiftie himself, the Kansas City Chiefs quarterback continued: "Man, I'll tell you what. The London shows, I think she's at Wembley eight times, which is mind-blowing that she can do that many shows in one stadium and fill that thing up.

"I played at Wembley once and I don't even think we filled that thing up."

And it seems this support is a two-way street for the power couple as Travis added: "We're both very career-driven. We both love what we do, and any chance that I can show my support to her - and knowing that she's showing me all the support in the world throughout the season - it's just been an amazing experience getting to know Tay."