Complex sentence: Steven Yeun (Korean: 연상엽; born December 21,1983) is a Korean American actor, best known for portraying Glenn Rhee on the "The Walking Dead", an AMC television horror drama series (2010-present).
Split into simpler sentences: Steven Yeun (Korean: 연상엽; born December 21,1983) is a Korean American actor. He is known for portraying Glenn Rhee in the AMC series "The Walking Dead" (2010--present).