The first fully authorized documentary of the late Nirvana frontman, Kurt Cobain, now has a release date. If you don't already have HBO, you have until May 4 to subscribe.

'Kurt Cobain: Montage of Heck' reportedly features footage from Cobain's archives, which includes home movies, photos, artwork and previously unheard music. HBO said, quote, "It features dozens of Nirvana songs and performances, as well as previously unheard Cobain originals."

The documentary will first debut at the Sundance Film Festival later this month before making its way to TV in May. Make a date with HBO on May 4.