Iron Maiden will release its first feature-length film to cinemas around the world on April 21.

Entitled "Iron Maiden: Flight 666," the documentary-style film follows the heavy metal stalwarts on their Somewhere Back in Time world tour in February and March of 2008, which saw them play to sold-out stadiums in Asia, Australia and North, Central and South America.

Award-winning Canadian documentary-makers Banger Productions accompanied the band through the tour and were given unprecedented access on and off the stage for "Iron Maiden: Flight 666."

Included alongside live performance footage is behind the scenes antics from the ground to the air, where the band flew on their own customized Boeing 757 airliner, piloted almost entirely by lead singer Bruce Dickinson.

The high definition film, mixed by the band's producer, will be screened in 2K digital cinemas with 5.1 surround sound.

"Iron Maiden: Flight 666" will be released in association with EMI Music, Universal U.S. and Arts Alliance Media.

The next leg of the Somewhere Back in Time world tour begins Feb. 1 and continues until March 16, including a massive open-air show at Sao Paolo's Interlagos Stadium.