Joe Alwyn received co-producer credit on Taylor Swift’s “august” alongside Swift and Jack Antonoff. The song’s main credits list all three as producers, while Swift and Antonoff are listed as its songwriters.
Alwyn’s production credit is connected to the pseudonym William Bowery, which he used for songwriting and musical contributions on Folklore and Evermore. The Recording Academy later recognized his contribution after Folklore won Album of the Year at the 63rd Annual Grammy Awards.
A common mix-up is to treat every collaborator on Folklore as a writer of every song. Aaron Dessner was a major album collaborator, but “august” was written by Swift and Antonoff. Alwyn’s credit on this track is specifically a production credit, not a songwriting credit.