United Kingdom, Sept. 9 -- Charlie Sheen used alcohol to hide his stutter.

The former Two And A Half Men star spent years dealing with addiction issues and he's now confessed he became dependent on alcohol for a long time because it helped ease his speech impediment. Charlie kept his stutter secret for years, but opened up about it in his new memoir The Book of Sheen, writing: "Not being able to say certain words or sounds was one of the main reasons I learned to drink."

He was asked about the stutter during an appearance on Good Morning America this week and Charlie said: "Drinking just ... it softened the edges.

"It gave me just freedom of speech."

During the interview, Charlie admitted he didn't talk openly about his stutter until ...