AceShowbiz - Taylor Swift opened her first Eras Tour show in London's Wembley Stadium on Friday with a special performance of "The Black Dog", marking its live debut. The surprise acoustic set also included a mash-up of "Maroon" and "Come Back... Be Here"

Swift's Wembley Stadium show featured a surprise section where she performed rare acoustic renditions of her songs. She also debuted "The Black Dog" live for the first time. Widely believed to be about The 1975 frontman Matty Healy, the song includes references to a South London pub and the pop-punk band The Starting Line, which The 1975 has covered.

Despite speculation that Swift would perform "London Boy" or "So Long, London," which many believe are about her former relationship with actor Joe Alwyn, she surprised the audience with other tracks from her catalog, including "Hits Different" from "Midnights", "Death By A Thousand Cuts" from "Lover", and a mash-up of "Maroon" and "Come Back... Be Here".

High-profile figures attended the concert, including Swift's boyfriend, NFL athlete Travis Kelce, "Bridgerton" star Nicola Coughlan, Cara Delevingne, "Queer Eye" Jonathan Van Ness, and Labour Party leader Keir Starmer. The royal family, including Prince William and his children, was also reported to be present.

Swift's first U.K. performance received a royal welcome with the military band playing a rendition of her hit "Shake It Off" during the changing of the guard at Buckingham Palace.