Image via Cat Power's Instagram

Image via Cat Power’s Instagram

Janis, the much-anticipated Janis Joplin documentary directed by Amy Berg, is expected to premiere at the Venice Film Festival this September. While many details about the film haven’t been fully announced, one big one was revealed today. According to Pitchfork, Cat Power (aka Chan Marshall) will narrate the documentary, specifically reading aloud letters written by the late singer. Says Berg of the news:

“After attempting to get this film off the ground for 7 years, I am ecstatic that the film is finally ready to be seen. This has been a labor of love and I cannot wait to share Janis’ unique, intimate story with the world. Chan Marshall (Cat Power) has delivered a beautiful, introspective voice of Janis by reading her letters.”