Lee Byung Hun spoke about acting in English still being a difficult task.
(Despite the fact that his English is very good, watch the first G.I. Joe!) On April 25, there was a press conference for “G.I. Joe: Retaliation” held at the Apgujeong CGV. 
Lee Byung Hun said, “Speaking English and acting in English are two very different tasks. Acting in English is very difficult. Because I need to act in a different language, I need to practice hard enough so that if I suddenly wake up after a nap, I can still say my lines.”
He continued, “When a staff member tells me that I pronounced something wrong, my mind goes blank. I immediately have to think about pronunciation and that blocks me from thinking about what kind of acting I am doing or what kind of lines I am saying. It feels like I am a rookie actor all over again.”
Lee Byung Hun reprises his role of “Storm Shadow” in G.I. Joe: Retaliation. The film will be released on June 21 in South Korea, and June 29 in the U.S.
Source:SOOMPI