Producer: Jack Antonoff - Artist: Taylor Swift - Producer: Taylor Swift - Recording Engineer: Laura Sisk - Recording Engineer: Jack Antonoff - Asst. Recording Engineer: John Rooney - Mixer: Serban Ghenea - Mix Engineer: John Hanes - Vocals: Taylor Swift - Programmer: Jack Antonoff - Drums: Jack Antonoff - Percussion: Jack Antonoff - Bass Guitar: Jack Antonoff - Acoustic Guitar: Jack Antonoff - Keyboards: Jack Antonoff - Recording Arranger: David Cook - String Arranger: David Cook - Piano: David Cook - Violin: David Angell - Violin: David Davidson - Cello: emily nelson - Viola: Kristin Wilkinson - Recording Engineer: Derek Garten - Recording Engineer: Josh Keith