Old Crow Medicine Show have been invited to become members of the Grand Ole Opry.

According to Country Weekly, the bluegrass string band revivalists were on stage at a sold-out show in Cleveland, Ohio when their longtime friend and supporter, Marty Stuart, surprised them with the invitation.

“In 1925, there was a show started in Nashville called the Grand Ole Opry. It was founded on a traditional fiddle tune,” Stuart said. “It's been going on for 88 years. It's a great American story. Would you all consider becoming a part of this great American story and becoming Grand Ole Opry members?”

The group were discovered by bluegrass legend Doc Watson while busking outside a pharmacy in Boone, N.C. in 2000. They have since recorded four studio albums, helping to revive American roots music through a series of tours, Opry performances, and appearances on 'A Prarie Home Companion.' The group are best-known to many fans for their song 'Wagon Wheel,' which scored Darius Rucker a No. 1 hit when he covered it with Lady Antebellum.

Old Crow Medicine Show will be inducted into the Opry during a ceremony on Tuesday, Sept. 17, at the Grand Ole Opry House in Nashville.