(11/25 1 p.m. PT): It has just been revealed that SCI will perform a special “The Doobie Incident” set at Lockn’ featuring classic rockers The Doobie Brothers.

Earlier today, Lockn’ Festival organizers confirmed Widespread Panic would return for next September’s event as well as Tedeschi Trucks Band. Now we have our third Lockn’ ’15 lineup announcement as The String Cheese Incident have been added to the bill.

The String Cheese Incident will play two nights at Lockn’ 2015. All three bands announced thus far have played each installment of the now three-year-old festival. In 2013 SCI collaborated with Zac Brown and this past September they presented a String Cheese & The Gang set featuring JT Taylor. Lockn’ 2015 takes place at Oak Ridge Farm in Arrington, Virginia between September 10 -13. Tickets go on sale on Monday, December 1 at 10 a.m. ET. Look for more artist announcements soon.

UPDATE 11/25 1 p.m. PT: It has just been revealed that SCI will perform a special “The Doobie Incident” set at Lockn’ featuring classic rockers The Doobie Brothers.