Brothers in vest-wearing Justin Timberlake and Marcus Mumford collaborating on tracks for the new Coen brothers movie

Vest twins Justin Timberlake and Marcus Mumford have collaborated on at least one track for the new folk-tinged Coen brothers movie. Timberlake stars in the film, Inside Llewyn Davis, with Mumford’s wife, Carey Mulligan, so the pairing’s not that outlandish in theory, but should no doubt alienate all sorts of Mumford-haters when it comes out.

Timberlake told Capital FM that he “became very good friends” with the Mulligan/Mumfords and that he doesn’t “know any other world”—other than, say, The Grammys—“where we would have the opportunity to collaborate like that, but it was so much fun.”

Inside Llewyn Davis isn’t due out until December, so the soundtrack should be out sometime around then as well. [via Consequence Of Sound]