Slacker Uprising documents Moore's 62-city tour of key swing states during the 2004 US presidential election, when he tried to convince young non-voters to give voting a shot.

"This is being done entirely as a gift to my fans," Moore said in a statement. "The only return any of us are hoping for is the largest turnout of young voters ever at the polls in November."

Slacker Uprising, budgeted modestly at over $2 million, was funded by Moore along with movie executives Bob and Harvey Weinstein, who hold international rights, said a spokesman for Moore.

It marks his follow-up to the healthcare expose Sicko, which earned just $24.5 million at the North American box office last year, far short of the $119 million haul for his 2004 political blockbuster Fahrenheit 9/11.