Leftover Salmon have announced a bunch of new guests for their upcoming show at the Ryman Auditorium in Nashville. The special performance—a 15th anniversary celebration for the band’s acclaimed The Nashville Sessions album—will now feature appearances Del McCoury, Ronnie McCoury, Rob McCoury, Col. Bruce Hampton, Darrell Scott and Elizabeth Cook. The concert is set to take place this coming Monday, September 15.

The new guests will join a lineup that already includes a number of artists that appeared on The Nashville Sessions, including Widespread Panic’s John Bell, Taj Mahal, Sam Bush, Reese Wynans, Bill Payne, Sally Van Meter, Jeff Coffin, Jo-El Sonnier, Todd Parker Mohr and John Cowan.

Leftover Salmon are also trying to raise money for a free webcast of the event via a PledgeMusic campaign. Fans can contribute here if they would like to help make that happen.

As of now, a limited number of tickets for the shows had been re-released.