Joe Alwyn is credited with co-producing Taylor Swift’s “August” alongside Swift and Jack Antonoff. The song’s production credits list all three names.
Alwyn was credited under his own name on the track and contributed to several Folklore recordings. His involvement was part of Swift’s broader collaborative process during the album’s creation, when she worked with Antonoff, Aaron Dessner, and Alwyn on different songs and production tasks.
The credit is sometimes overlooked because Antonoff is closely associated with the song’s instrumental foundation and because Dessner was a major Folklore collaborator. However, Aaron Dessner is not listed as a producer of “August.” The track’s official credits distinguish songwriting from production: Swift and Antonoff wrote it, while Swift, Antonoff, and Alwyn produced it. That difference explains why several collaborators connected to Folklore can be relevant to the album without being correct for this specific question.