Producer: Jack Antonoff - Artist: Taylor Swift - Featuring: Post Malone - Producer: Taylor Swift - Vocal Producer: Louis Bell - Mixer: Serban Ghenea - Mix Engineer: Bryce Bordone - Recording Engineer: Laura Sisk - Recording Engineer: Oli Jacobs - Asst. Recording Engineer: Jon Sher - Asst. Recording Engineer: Jack Manning - Asst. Recording Engineer: Lauren Marquez - Recording Engineer: Sean Hutchinson - Recording Engineer: Michael Riddleberger - Vocal Engineer: Louis Bell - Mastering Engineer: Randy Merrill - Mastering Engineer: Ryan Smith - Drums: Jack Antonoff - Synthesizer: Jack Antonoff - Percussion: Jack Antonoff - Electric Guitar: Jack Antonoff - Acoustic Guitar: Jack Antonoff - Programming: Jack Antonoff - Drums: Sean Hutchinson - Vocals: Taylor Swift - Vocals: Post Malone