Taylor Swift performs onstage during “Taylor Swift | The Eras Tour” at State Farm Stadium on March 18, 2023, in Swift City, ERAzona (Glendale, Ariz.) The city of Glendale was ceremonially renamed Swift City for March 17-18 in honor of The Eras Tour.Kevin Mazur/GI for TAS Rights Management

It’s nice to have a friend, and Taylor Swift has plenty of famous pals that have been supporting her on her massive The Eras tour, which kicked off on March 17 in Glendale, Ariz.

Besides friends such as HAIM, Laura Dern, Emma Stone and Shania Twain watching from the crowd and singing along to every word, Swift also surprised fans with onstage appearances. Despite telling Swifties during night one at Las Vegas’ Allegiant Stadium that “we don’t have guests at this show,” the pop superstar invited Marcus Mumford, the Mumford & Sons frontman, for her debut live performance of “Cowboy Like Me,” from Swift’s chart-topping 2020 album, Evermore.

Other music stars have also gotten an invite from Swift to perform alongside her on the tour, including opener Gracie Abrams, frequent collaborator Aaron Dessner, Taylor Lautner, Phoebe Bridgers, Ice Spice, Maren Morris and more.

See below for all the celebrities who have made appearances at Swift’s The Eras tour stops, either in the audience or on stage, which we’ll be updating as the 14-time Grammy winner makes her way around the world.