Filmmaker Cameron Crowe has been working on a documentary, called 'The Union', it's described as a personal look into Elton John, and his musical hero, Leon Russell.

The film follows the two as they work on a album with legendary producer  T-Bone Burnett, they all started working on this project in 2009.

And after over 2 years in production the film is set to make its debut at the Tribeca Film Festival, which begins in New York on April 20th.

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