A film celebrating the life of Clash frontman Joe Strummer is to receive its world premiere at the Sundance festival in Utah tomorrow.

The film, The Future Is Unwritten, directed by Julien Temple, promises to be the definitive documentary about the legendary rock musician, who died of a heart defect in December 2002.

Temple - who also made the Sex Pistols documentary The Filth and the Fury - interviewed friends of Strummer from the days when he was squatting in London.

According to the Daily Mail, the film also features real footage of his early life, as well as rare clips of the band.

Strummer, whose radical left wing lyrics established The Clash as campaigners against fascism, racism and American expansionism, has been described by Temple as "a comparative figure to Winston Churchill".