The British trio Alt-J are a massively successful band with a much-anticipated album about to come out, but for many of us, even those of us in the music press (ahem), it’s been entirely possible to move through life without even knowing what those guys look like. Mystery solved: They look like some dudes. Last night, they were on the Late Show With David Letterman the bluesy, Black Keys-esque quasi-joke “Left Hand Free.” Below, you can watch the performance and stick around for the moment where Letterman asks them what award they won, as if he doesn’t believe the “award-winning” bit of text that he read when introducing them.

Alt-J’s new album This Is All Yours is out 9/23 on Canvasback/Infectious.