The controversial star’s drug battles are well-documented, but she has previously denied using the drug while expecting her daughter.
The film premiered at the Sundance Festival earlier this week, and in an interview scene, Courtney admits to using heroin while expecting a baby.
“I used it once then stopped," she states. "I knew she would be fine."
The Hole frontwoman and her daughter have had a famously rocky relationship in recent years, however, they presented a united front at the festival, posing together for the first time in five years.
Frances worked with director Brett Morgen to create the HBO doc, and it includes previously unseen videos, unreleased songs and diary entries.
Watch a video review of the film below...