Samuel L Jackson has revealed he has a stutter, and he has a very special method of overcoming it on film sets - cursing.
The 64-year-old actor - who plays SHIELD leader Nick Fury in the Marvel comic book movies - addressed the American Institute for Stuttering gala, giving a moving talk about how growing up with a speech impediment had affected him, Vulture.com reported.
Samuel told the audience: "Growing up a stuttering black kid in Tennessee in the fifties didn't quite make me think I was going to end up in a place like this."
He went on to reveal he had been teased at school, which spurred him on to study and become smarter as "revenge", and how, eventually, he learned how to "pretend to be other people who didn't stutter".
But he admitted the stutter still affects him sometimes, and he has developed his own unique approach to overcoming it.
Samuel revealed: "I was the other day on the set of Captain America, and they said 'Action!' and I said, 'G-g-g-et...' It was a 'G' day. So I have my days. I have 'G' days, I have 'P' days, I have 'B' days, I have 'S' days, and I'm still stuttering.
"But I figured out a way to do it. And some days, the best thing for me to do is say my favourite word, and I get through it: 'Motherf*****!'"
He later confirmed to Vulture: "I do that. Every day. I say it and it helps, like even if I just say it to myself, under my breath. I don't stutter when I say that word."