Holy Hell, which debuted at last month's (Jan16) Sundance Film Festival and competed for a documentary prize, centres on the Buddha Field community and includes interviews with ex-members, according to Variety.com.

"Holy Hell is relentless, haunting and unforgettable," Leto says. "This unflinching documentary expose takes us on a beautiful and bizarre journey in search of faith, love and family, but ends up showing us how the business of spirituality, power and corruption are often religion's menage a trois."

"Jared saw an early cut of the film, which I shot over 22 years as the unofficial videographer of the group, and responded to the intimacy of our story," director Will Allen adds. "It's an honour to be able to work with an artist that I respect so much, especially for my first feature-length documentary."