PORTLAND — Rock and Roll Hall of Fame singer-songwriters David Crosby and Graham Nash will bring their legendary vocal harmonies to the State Theatre on Saturday, May 21, as part of their spring tour.

They will be accompanied on the road by a band featuring keyboardist James Raymond, guitarist Dean Parks, bassist Kevin McCormick and drummer Steve DiStanislao.

The tour will mix acoustic and plugged-in performances.

“Touring with a full band gives us the opportunity to do selections from our catalogue that Graham and I haven’t performed live together before,” Crosby said is a prepared release. “We will also be introducing some brand new songs we’ve written that have never been heard on-stage or on record.”

Crosby and Nash are also launching their own label, Blue Castle Records, with the first-ever digital and vinyl editions of the live album “Another Stoney Evening.'” The set was recorded 40 years ago, in 1971, at the Dorothy Chandler Pavilion in Los Angeles.

“This album represents the very beginning of our musical relationship as a duo,” Nash said. “Whatever David and I do well together, it’s wonderful that we’re still doing it well. For the upcoming tour, with a rock ‘n’ roll band, we’ve gotten fantastic advance response. It’s exciting to be bringing this great new show to people.”

Crosby and Nash have each been inducted into the Rock and Roll Hall of Fame twice — once with Crosby, Stills & Nash, and a second time with the Byrds and the Hollies, respectively.

Tickets go on sale at 10 a.m. on Saturday, Feb. 19. They are $61, $51 and $36. For tickets, visit the Cumberland County Civic Center box office, call 800-745-3000 or log on to www.statetheatreportland.com. The State Theatre is at 609 Congress St.

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