Backing Vocals, Piano, Synthesizer [Juno] – Ryan TedderDrum Programming, Synthesizer – Noel ZancanellaEngineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer – Noel Zancanella, Ryan Tedder, Taylor SwiftRecorded By – Ryan Tedder, Smith CarlsonRecorded By [Assistant] – Eric Eylands, Matthew TrybaWritten-By – Ryan Tedder, Taylor Swift

Acoustic Guitar, Electric Guitar, Bass, Percussion, Sounds [Stomps] – Shellback Backing Vocals – Taylor SwiftEngineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer, Keyboards, Programmed By – Max Martin, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceVoice [Shouts] – Shellback , Taylor SwiftWritten-By – Max Martin, Shellback , Taylor Swift

Backing Vocals – Taylor SwiftEngineer [For Mix] – John HanesGuitar [Additional] – Shellback Guitar [Funkalicious] – Niklas LjungfeltMastered By – Tom CoyneMixed By – Serban GheneaProducer, Keyboards – Ali Payami, Max Martin, Shellback Programmed By – Ali Payami, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceWritten-By – Ali Payami, Max Martin, Shellback , Taylor Swift

Acoustic Guitar, Electric Guitar, Bass, Keyboards, Drums, Backing Vocals – Jack AntonoffEngineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer [Vocals] – Max MartinProducer, Written-By – Jack Antonoff, Taylor SwiftRecorded By – Laura Sisk, Sam HollandRecorded By [Assistant] – Brendan Morawski, Cory Bice

Backing Vocals – Taylor SwiftDrums, Bass, Percussion – Mattman & RobinEngineer [For Mix] – John HanesGuitar – Mattman & Robin, Shellback Mastered By – Tom CoyneMixed By – Serban GheneaProducer, Programmed By, Keyboards – Mattman & Robin, Max Martin, Shellback Recorded By – Sam HollandRecorded By [Assistant] – Cory BiceWritten-By – Max Martin, Taylor Swift

Acoustic Guitar, Bass, Drums, Percussion – Shellback Engineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer, Keyboards, Programmed By – Max Martin, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceSaxophone – Jonas ThanderTrombone – Magnus WiklundTrumpet – Jonas LindeborgWritten-By, Backing Vocals, Handclaps, Voice [Shouts] – Max Martin, Shellback , Taylor Swift

Acoustic Guitar, Electric Guitar, Bass, Drums, Backing Vocals – Jack AntonoffMastered By – Tom CoyneMixed By – Serban GheneaProducer [Additional], Keyboards – Greg KurstinProducer [Vocals] – Max MartinProducer, Written-By – Jack Antonoff, Taylor SwiftRecorded By – Jack Antonoff, Sam HollandRecorded By [Assistant] – Cory Bice

Acoustic Guitar, Bass, Percussion, Sounds [Knees, Stomps, Noise] – Shellback Backing Vocals – Shellback , Taylor SwiftEdited By [ProTools] – Peter Carlsson Engineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaPiano – Max MartinProducer, Keyboards, Programmed By – Max Martin, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceWritten-By – Max Martin, Max Martin, Shellback

Acoustic Guitar, Electric Guitar, Percussion – Shellback Backing Vocals, Sounds [Heartbeat] – Taylor SwiftEdited By [ProTools] – Peter Carlsson Engineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaPiano – Max MartinProducer, Keyboards, Programmed By – Max Martin, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceRecorded By [Strings], Edited By [Strings], Arranged By [Strings] – Mattias BylundWritten-By – Max Martin, Shellback , Taylor Swift

Backing Vocals – Taylor SwiftEngineer [For Mix] – John HanesGuitar, Bass, Drums – Shellback Mastered By – Tom CoyneMixed By – Serban GheneaProducer, Keyboards, Programmed By – Max Martin, Shellback Recorded By – Michael Ilbert, Sam HollandRecorded By [Assistant] – Cory BiceWritten-By – Max Martin, Shellback , Taylor Swift

Coordinator [Production] – Jason Campbell Engineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer – Nathan Chapman, Taylor SwiftRecorded By, Electric Guitar, Bass, Keyboards, Drums – Nathan ChapmanWritten-By, Acoustic Guitar, Backing Vocals – Taylor Swift

Acoustic Guitar, Electric Guitar, Piano, Backing Vocals – Ryan TedderBass – Noel ZancanellaDrum Programming, Synthesizer [Additional], Programmed By – Noel Zancanella, Ryan TedderEngineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer – Noel Zancanella, Ryan Tedder, Taylor SwiftRecorded By – Ryan Tedder, Smith CarlsonRecorded By [Assistant] – Eric Eylands, Matthew TrybaWritten-By – Ryan Tedder, Taylor Swift

Engineer [For Mix] – John HanesMastered By – Tom CoyneMixed By – Serban GheneaProducer, Written-By – Imogen Heap, Taylor SwiftRecorded By, Vibraphone, Drums, Mbira, Percussion, Programmed By, Keyboards, Backing Vocals – Imogen HeapVocals – Taylor Swift