At the 63rd Grammy Awards, which two Folklore collaborators joined Taylor Swift while she performed "August"?

Jack Antonoff and Aaron Dessner joined Taylor Swift during her performance of "August" at the 63rd Grammy Awards.

The March 2021 performance presented songs from Swift's Folklore and Evermore period in a woodland, cottage-like setting. Swift performed "Cardigan" first, moved into "August," and then continued with "Willow."

Antonoff and Dessner were important collaborators on Folklore. Antonoff co-wrote and produced "August," while Dessner co-wrote and produced many other songs across Folklore and Evermore. The Grammy appearance marked the first time the three performed together.

Joe Alwyn was credited as a co-producer on Folklore, but he did not join Swift onstage for this performance. Bon Iver also appears on the album's song "Exile," yet was not one of the collaborators accompanying this performance.