Joe Alwyn was credited as the additional producer of Taylor Swift's “august.”
Alwyn used the pseudonym William Bowery for his creative contributions to Folklore and Evermore. On “august,” the listed producers are Swift, Jack Antonoff, and Alwyn. This credit is distinct from the songwriting credit, which is listed for Swift and Antonoff.
The credit became especially notable after Folklore won Album of the Year at the 63rd Annual Grammy Awards. The Recording Academy recognized Alwyn's production contribution, making him a Grammy winner connected to the album.
Fans often mix up Alwyn's role with Aaron Dessner's because Dessner co-wrote and produced many Folklore songs and joined Swift and Antonoff during the Grammy performance. Dessner was not the additional producer named for “august”; the third producer credit belongs to Alwyn.