Tonight on Late Show with Stephen Colbert, Dave Matthews will appear both as a guest and as a performer as he teams with acoustic collaborator Tim Reynolds for a performance as well.

As revealed by the DMB Twitter, the duo’s performance will also be supported by a string quartet that will join Matthews and Reynolds for the song, which is yet to be known. The DMB social channels shared the above photo of Matthews and Reynolds rehearsing with the quartet.

Late Show with Stephen Colbert airs on CBS at 11:35 PM ET.