Jack Antonoff co-wrote Taylor Swift’s “august” with Swift. He also co-produced the song, making him one of its central creative collaborators.
Antonoff began the track by producing its instrumental, then sent the music to Swift. She wrote the lyrics quickly and described the process as intuitive. This workflow helped shape the song’s hazy, atmospheric sound and its story of a brief summer romance.
Antonoff had already worked with Swift on 1989, Reputation, and Lover before Folklore. Their collaboration continued across several Folklore tracks, including “august.” Joe Alwyn was also credited as a co-producer, but he was not a co-writer of the song.
The track later became an annual seasonal favorite because its title and late-summer imagery encourage listeners to revisit it during August. Its recurring popularity is therefore connected both to the song’s subject matter and to its release-era storytelling.