The Montley Crue lead singer, Vince Neil, confirmed that the 63-year-old Oscar-winning actor will appear in the documentary, as the baddest rocker that ever tread the earth's surface, Ozzy Osbourne. The movie is based on the band's 2001 autobiography, 'The Dirt', and will focus on a life of struggle between band mates, drugs and alcohol abuse and living every day as if it were your last.

Ozzy Osbourne was a close friend to the guys from Montley Crue (Neil, Tommy Lee, Mick Mars and Nikki Sixx) and he toured with them in more than one occasion. Thus, he is included in the film and Walken was deemed the perfect man to fill in his shoes.

The project, expected to be released in 2008 by Paramount and MTV, will also show scenes in which Ozzy (Walken) snorts a line of living ants because he can't find his stash of cocaine and will cover the days when the rocker took LSD every single day for an entire year, just 'to see what would happen'.

Neil also revealed to ABC News that some other celebrities will cameo in 'The Dirt', both professional actors and musicians. Until now, he only mentioned the names of David Lee Roth and Val Kilmer, but he did let it to be understood that there's more to come. 'We're doing big, giant cameos with those people', he explained. As for the Montley Crue boys, their parts will be played by unknown actors.