Lee Byung-hun (Hangul: 이병헌; born July 12, 1970) is a South Korean actor and martial artist. A popular and acclaimed actor in South Korea, he is best known for Joint Security Area (2000), A Bittersweet Life (2005), The Good, the Bad, the Weird (2008), the television series Iris (2009) I Saw the Devil (2010), and Masquerade (2012). In the U.S., he is known for Storm Shadow in G.I. Joe: The Rise of Cobra (2009) and its sequel G.I. Joe: Retaliation (2013), and RED 2 (2013). He will be portraying the T-1000 in the upcoming Terminator Genisys (2015).