Demi Moore Reveals She had 24/7 sober companion on the set of "St. Elmo's Fire" to prevent her from relapsing into addiction.

At 22, Moore was undergoing treatment for alcohol and substance abuse when she was cast as Jules in "St. Elmo's Fire"

McCarthy who also starred in "St. Elmo's Fire" was surprised by Moore's revelation, claiming he hadn't noticed the sober companion on set

Despite her fear of failure and desperation to fit in, Moore appreciated the director's belief in her during her tumultuous times.

Moore shared that she had self-worth during the filming but is grateful for the support she received, despite her struggle.

Moore maintained soberiety for 20 years before relapsing in her 40s, as detailed in her 2019 memoir "Inside out".