Following the Kansas City Chiefs' Super Bowl victory in February, Travis Kelce has been having a busy offseason visiting many of the sold-out events of his girlfriend, Taylor Swift.

On Sunday, Kelce raised the stakes. When he joined Swift on stage at Wembley Stadium in London, many there were stunned. Kelce surfaced during a segment shortly before Swift sang "I Can Do It With a Broken Heart," from her most recent album, "The Tortured Poets Department," sporting a black top hat and tailcoat.

Kelce brought Swift to a couch on stage during a changeover, fanning her and making lighthearted expressions at the audience while helping her with a brief outfit change. Realizing what was happening, the audience burst in thrills.

Along with other celebs, Kelce had been seen in London previously for Swift's events. The pair even visited Prince William and his two kids at her Saturday show.

Set to finish in December, Swift's Eras Tour started in March 2023 in the United States. She will return to Wembley Stadium in August for five more gigs after performing next weekend in Dublin, Ireland.

Kelce has plenty of time to keep accompanying Swift on the European leg of her trip as Chiefs training camp does not start for over a month. Given the strong reaction to his Sunday cameo, it is certain he will be welcomed back on stage anytime he so wishes.