Although born in South Korea, Steven Yeun is from Chicago and has performed with the Second City Theatre. He starred in another TV series, the Big Bang Theory and in an independent film My Name is Jerry. He also appeared on the commercials of Best Buy, Apple and Milky Way.
Below are some pictures of Steven Yeun, the Asian Guy on "The Walking Dead':
You might also like this Youtube Video of Steven Yeun about Sexual Identity. Lol.
Check out a Q & A interview of Steven Yeung here.