Last month we revealed that Bootsy Collins and the Funky Unity Band, The Flaming Lips and more would be joining the String Cheese Incident for their December 28 and 29 shows at the 1stBank Center in Broomfield, CO. Now, it looks like the Del McCoury Band will be joining them on December 31 for the final night of their run.

The String Cheese Incident posted a statement on their Facebook page today that reads:

When we started 20 years ago, it was bluegrass that filled the setlists. We are over the top excited to announce that the most awarded bluegrass band in history will open and play with us on New Year’s Eve! The Del McCoury Band is joining us on December 31st to celebrate 20 years of The String Cheese Incident. Del and the boys have been a welcomed guest at many Incidents in the past, and we’re thrilled to have them on hand for our big 3-set night on NYE!

Tickets for the String Cheese Incident’s New Year’s Eve shows—which are now being billed as a 20th anniversary run—are still on sale.