Never-before-seen photos, videos and unpublished lyrics from the late Nirvana frontman Kurt Cobain, are to be the focus of a new documentary about the singer made by his family.

Kurt Cobain: Montage of Heck will be the first fully authorised film about the musician and will use material generously released by his family, in an attempt to “challenge the existing mythologies” around him, according to the film’s director Brett Morgen.

Frances Bean Cobain (daughter to the late grunge star and the singer Courtney Love) has signed up to be the film’s executive producer, will to dock set to screen on HBO next year.

Mr Morgen never met Cobain when he was alive, but has worked on the documentary for eight years and was initially sceptical about unearthing new material: “However, once I stepped into Kurt’s archive, I discovered over 200 hours of unreleased music and audio, a vast array of art projects, countless hours of never-before-seen home movies, and over 4,000 pages of writings,” he said.

The film’s name is taken from a mixtape Cobain made back in 1988, which has not been released to the public. The new material paints an “intimate portrait of an artist who rarely revealed himself to the media”, said Mr Morgen, a music lover who also directed the 2012 Rolling Stones documentary Crossfire Hurricane.

Nirvana songs and performances will feature in the film, as well as unheard tracks, home movies, Cobain’s paintings and sculptures. The director also had access (granted by immediate family) to Cobain’s early photography, demos, journals and family archives.

Love, Cobain’s widow, was interviewed in depth for the film, as well as his mother, Wendy O’Connor. Nirvana bandmates Dave Grohl and Krist Novoselic also approved of the project.

It is the latest in a string of documentaries about the late musician, including A J Schnack’s About a Son, Nick Broomfield’s Kurt & Courtney, and Soaked in Bleach, which is yet to be released.

Cobain died in 1994. He was 27.

Listen to Cobain’s original ‘Montage of Heck’ mixtape below: