Producer: Jack Antonoff - Artist: Taylor Swift - Producer: Taylor Swift - Recording Engineer: Laura Sisk - Recording Engineer: Jack Antonoff - Mixer: Jonathan Low - Mastering Engineer: Randy Merrill - Drums: Jack Antonoff - Programmer: Jack Antonoff - Electric Guitar: Jack Antonoff - Keyboards: Jack Antonoff - Background Vocalist: Jack Antonoff - Saxophones: Evan Smith - Clarinet: Evan Smith - Flute: Evan Smith - Keyboards: Evan Smith - Electric Bass: Evan Smith - Strings: Bobby Hawk - Engineer: Mike Williams - Engineer: Jon Gautier - Composer/Author: Taylor Swift