| A | Fortnight- recording engineer:
- Louis Bell (lead vocals [Post Malone vocal]), Sean Hutchinson (drums (drum set) [Sean Hutchinson drums]), Oli Jacobs, Michael Riddleberger (drums (drum set) [Sean Hutchinson drums]) and Laura Sisk
- programming:
- Jack Antonoff
- assistant engineer:
- Jack Manning, Lauren Marquez and Jon Sher
- engineer:
- Bryce Bordone (task: mix engineer)
- producer:
- Jack Antonoff, Louis Bell (lead vocals [Post Malone vocal]) and Taylor Swift
- mixer:
- Serban Ghenea
- acoustic guitar, analog synthesizer [juno], electric guitar, percussion and synthesizer [M1]:
- Jack Antonoff
- drums (drum set):
- Jack Antonoff and Sean Hutchinson
- lead vocals:
- Post Malone and Taylor Swift
- phonographic copyright (℗) by:
- Taylor Swift (in 2024)
- recorded at:
- Conway Recording in Hollywood, Los Angeles, California, United States, Electric Feel Studios in Hollywood, Los Angeles, California, United States (lead vocals [Post Malone vocal]), Electric Lady Studios in Greenwich Village, New York, New York, United States and Hutchinson Sound in Brooklyn, New York, New York, United States (drums (drum set) [Sean Hutchinson drums])
- mixed at:
- MixStar Studios in Virginia Beach, Virginia, United States
- music videos:
- Fortnight by Taylor Swift feat. Post Malone and Fortnight by Taylor Swift feat. Post Malone
- part of:
- Best of 2024: Today’s Hits (number: 4), MTV Video Music Award for Song of the Year nominees (number: 2024), Top Songs of 2024: Global (number: 20), Billboard Year-End Hot 100 singles of 2024 (number: 22), Top Songs of 2024: China (number: 48), Billboard Hot 100: 2025-04-26 (number: 33) and Grammy Award: Record of the Year nominees (number: 2025)
- recording of:
- Fortnight
- writer:
- Jack Antonoff, Austin Post and Taylor Swift
- premiered at:
- The Eras Tour: Paris
- publisher:
- ISIMO Compositions, Songs of Universal, Inc., Universal Music Corp., Universal Music Works, Ducky Donath Music (from 2023 to present), Posty Publishing (from 2023 to present), Sony/ATV Songs LLC (from 2023 to present) and TASRM Publishing (from 2023 to present)
- sub-publisher:
- Universal Music Publishing Ltd., シンコーミュージック・エンタテイメント and ユニバーサル・ミュージック・パブリッシング Synch事業部
- part of:
- Grammy Award: Song of the Year nominees (number: 2025)
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