Tons of celebrities attended Taylor Swift's Eras Tour throughout its nearly two-year run - and some of them also pop up in her new Disney+ docuseries, Taylor Swift: The End of an Era. The six-part special debuted on Disney+ December 12 and features cameo appearances from Swift's family members as well as some of her more famous pals. In the first episode, for example, the pop star's longtime friend and collaborator Ed Sheeran appears before her London show.