Hadestown is the fourth studio album by Vermont-based Anaïs Mitchell, and was released by Righteous Babe Records on March 9, 2010. The concept album, which became the basis for the stage musical of the same name, follows a variation on the ancient Greek myth of Orpheus and Eurydice, where Orpheus must embark on a quest to rescue his wife Eurydice from the underworld. It has been advertised as a "folk opera". Several of the songs feature singers other than Mitchell, including Justin Vernon (better known as lead vocalist and guitarist of Wisconsin-based band Bon Iver), Ani DiFranco, Greg Brown, Ben Knox Miller (The Low Anthem) and Tanya, Petra and Rachel Haden (referred to in the track listing as 'The Haden Triplets').