Steven Yeun, 26, from The Walking Dead, pronounces his last name like this. His full Korean name is 연상엽 (Yeon Sang Yeop).
Sung Kang, 39, from Fast Five (and G.O.D.'s Lie video, circa 2000), like Steven Yeun has one of those Korean names where until you hear it you have no idea what to do with the "U." It turns out he pronounces it like this. His full Korean name is 강성호 (Kang Seong Ho). In Korea, his last name is more like "Kong" than "Kang" but whatever works, right?