Tuxedoed Travis Kelce joins Taylor Swift onstage at Wembley Stadium show

LONDON -- Swifties were treated to a big surprise at Sunday's Taylor Swift concert in London.

She brought out a special guest - boyfriend Travis Kelce.

Fans cheered at Wembley Stadium as the NFL star graced the stage in a tuxedo and a top hat, carrying Swift on to the stage.

He joined Swift for her outfit change for her song "I Can Do It With A Broken Heart" - now part of her "Eras Tour."

This is the first time Kelce has ever joined Swift onstage - and he even went all-out with some of his own dance moves.