United Kingdom, Sept. 12 -- Sami Sheen had no idea she was the reason her father Charlie Sheen got sober.

In his new Netflix documentary, aka Charlie Sheen, and memoir, The Book of Sheen, Charlie revealed it was an interaction with his eldest daughter that convinced him to quit alcohol and drugs for good.

He revealed that back in 2017, after he had drank three coffees with whiskey, he had to ask a friend to pick Sami up from her appointment and her reaction led to him swearing off drink and drugs forever.

He shared: "Sam was very quiet. I didn't need to be clairvoyant to know exactly what she was thinking. 'Why is Dad not driving - again? Why isn't it just the two of us in the car like it used to be? When will that moment ever return? ...