Originally launched in 2004, it documented the departure of bassist Jason Newsted, frontman James Hetfield's flight into rehab to deal with his alcoholism, and the resulting difficulties in rebuilding relationships as they struggled to make eighth album St Anger.

Ulrich tells TheWrap: "The making of the movie was one of the most extraordinary experiences in my life, precisely because it came at such a vulnerable time.

"The presence of cameras helped keep the process on track - there was another set of eyes and ears there. When somebody else is in the room you watch your Ps and Qs a little more. I think it kept the whole thing from derailing."