Taylor Swift performs 'Exile' with Bon Iver and Aaron Dessner in London.

Taylor Swift joined Bon Iver at his SSE Arena Wembley London show this evening to perform their track 'Exile' - along with her close collaborator Aaron Dessner. The frontman of Bon Iver, Justin Vernon, introduced Swift to the stage by saying: "The most talented person in the world, Taylor Swift."

Watch clips of the performance below...