In the documentary, the filmmaker captures John's composition process on film, and follows British music-maker and Russell through the recording of the album, which was helmed by Grammy-winning producer T Bone Burnett.
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"The Union," which was directed and co-produced by Crowe, premiered on the opening night of the 2011 Tribeca Film Festival. HBO Documentary Films acquired the domestic rights for the documentary from Vinyl Films.
"I’m a great fan of HBO and their extraordinary programming, so I’m particularly thrilled that they will be airing 'The Union,'" John said of the acquisition.