Celebration is going to perform at Occupy Baltimore November 12.
After organizers sought support from local celebrities and artists, the band is the first to agree to perform at the encampment at McKeldin Square.
Others - Dan Deacon, Wye Oak, Animal Collective's Deakin - have expressed support for the protest but said they're unavailable to perform because of touring commitments.
Celebration, which put out a widely acclaimed album earlier this year, "Hello Paradise," is finishing a tour with locals Arbouretum. The band also opened for TV on the Radio on the art-rock band's tour earlier this year.
The band will perform between 4 and 5 p.m. on Saturday November 12. They are likely to perform an acoustic set, according to Occupy's Google group.
The protests in New York have drawn several well-known performers, Rufus Wainwright, Sean Lennon, and Jeff Mangum, among them. Crosby & Nash said this week they would also perform.
The Occupy Baltimore protest has now spent five weeks at McKeldin. City officials have been circumspect about their plans for the its future at the plaza.