Kurt Cobain of Nirvana during the taping of MTV Unplugged at Sony Studios in New York City, 11/18/93.

Director Brett Morgen's long-gestating documentary on Kurt Cobain has found a home at HBO.

Kurt Cobain: Montage of Heck, which Morgen has been working on since 2007, will debut on HBO in 2015 in addition to receiving an international release. HBO Documentary Films and Universal Pictures International Entertainment Content Group are co-producing the authorized documentary.

It is the first documentary to be made with the cooperation of Cobain’s family and will include never-before-seen home movies, recordings, artwork and photography, plus material from his personal archives, family archives and songbooks. The film features dozens of Nirvana songs and performances as well as previously unheard Cobain originals.Cobain committed suicide 20 years ago at the age of 27.

Cobain's daughter with Courtney Love, Frances Bean Cobain, is an executive producer with Larry Mestel and David Byrnes.

Two years ago, when Morgen was promoting his Rolling Stones film Crossfire Hurricane, he described the Cobain film as a mix of animation and live action that he hoped would be the equivalent of Pink Floyd's "The Wall" for a new generation. In HBO's announcement of the film, Morgen did not discuss the structure of the film nor how the content would be presented.

Morgen did say in a statement that he sorted through 200 hours of unreleased music and audio, multiple art projects and more than 4,000 pages of writings. Collectively, Morgen said, they "help paint an intimate portrait of an artist who rarely revealed himself to the media."