"I was a little bit like, 'Holy shit. What have we done?'" says Mumford & Sons' Ben Lovett about the band's new video for "Hopeless Wanderer." The hilarious clip, directed by Sam Jones and stars Jason Bateman, Ed Helms, Will Forte and Jason Sudeikis. "It was just a lot funnier than I think any of us had expected, 'cause the guys were totally just riffing. They're not only very well known comedians, they're also four of the best improvisors in like the comedy world...So they basically spent a day just messing around and what they came out with just blew us all away."