Which collaborator co-produced Taylor Swift's song “august” alongside Swift?

Jack Antonoff co-produced Taylor Swift's song “august” alongside Swift. Antonoff and Swift had already worked together on several earlier albums, including 1989, Reputation, and Lover, before collaborating on Folklore.

For “august,” Antonoff developed the instrumental first and sent it to Swift. She then wrote the lyrics, which center on a fleeting summer relationship and the feeling that the romance was never truly hers. The production uses reverb-heavy textures, guitars, strings, and keyboards to create a hazy late-summer sound.

Joe Alwyn also contributed to the production, but the original Folklore liner-note credits listed Swift and Antonoff as producers. The Recording Academy later recognized Alwyn as a co-producer after Folklore won Album of the Year at the 63rd Annual Grammy Awards. Aaron Dessner was another major Folklore collaborator, but he was not the answer to this specific co-production question.