The Pulp Fiction star began performing in school plays when he was a young child but Jackson confesses he was constantly teased by his fellow classmates for having a stammer.
And the actor reveals his aunt finally took him to a communication specialist to boost his self-esteem.
He tells the New York Magazine, “It manifests itself more when I read than when I talk. I have no idea why.”
But the 63 year old no longer feels any shame, insisting some of his best pals and Hollywood greats have also struggled with a speech disorder.
He adds, “Denzel (Washington) stuttered. James Earl Jones stuttered. There are still days when I have my n-n-n days or r-r-r days. I try to find another word.”