Taylor Swift's boyfriend, Travis Kelce, was a very special guest at her most recent London performance.
The Kansas City Chiefs player danced with the singer on stage while wearing a top hat and tails during the song "I Can Do It With a Broken Heart."
In addition to carrying Swift across the stage during the routine, Kelce used a brush to apply makeup to her face.
During the Eras tour, Kelce is performing with her for the first time.
Several fans shared a video of Kelce dancing and kicking his heels, looking like he was enjoying himself.
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Fans were shocked and delighted by the appearance, and many posted on social media to express their shock.
"If you would've told me a year ago that Travis Kelce would be on stage with Taylor Swift, I wouldn't have believed you," a reader wrote on X.
Many spectators, who were probably not familiar with American football, also expressed surprise at Kelce's considerable height of six feet five inches.
Swift performed their recently released duet, "Us," live for the first time with singer Gracie Abrams later in the evening.
Swift also performed a mashup of Out of the Woods, Is It Over Now?, and Clean, so that wasn't the only unexpected song.
As Swift's Eras tour makes its way to London's Wembley arena, celebrities have been flocking to see her perform. Sir Paul McCartney attended the show on Sunday and was spotted dancing and accepting friendship bracelets from fans.
Among the throng were Phoebe Waller-Bridge and Andrew Scott of Fleabag.
Hugh Grant has also been to see the Eras tour, and later gave Kelce a shout out on social media.
"Dear @taylorswift13, You have an incredible show, an amazing and v hospitable team and excellent if gigantic boyfriend," he posted on X.
Foo Fighters also played in London this weekend, with frontman Dave Grohl referencing Swift from the stage.
Grohl seemed to be mocking Swift when he said that the Foo Fighters "actually play live" on Saturday at London Stadium.
Swift shared a picture of herself on Saturday with Prince William, Prince George, Princess Charlotte, and Kelce—all of whom had attended as VIP guests on Friday.
Additionally, Swift had never shared a photo of herself and her boyfriend on social media before the royal selfie.
However, the couple has not kept their relationship a secret.
In September of last year, Swift attended her first Kansas City Chiefs game, and Kelce made their romance public.
Swift has been taking her Eras Tour across the UK with shows in Edinburgh, Liverpool, and Cardiff, taking fans through her catalog of hits, including from albums 1989, Red and Midnights.
The singer will return to Wembley in August for six more dates.
