Steven Yeun was born in Seoul, South Korea and his family first immigrated to Canada and stayed there for one year and moved to United States. He began acting when studying at Kalamazoo College in Kalamazoo, MI. When he realized his love for acting he went to study theatre in college instead of med school. He earned various roles in The Big Bang Theory (as Sebastian), My Name is Jerry (as Chaz) and different commercials for Best Buy, Apple, and Milky Way. However, Steven is perhaps best known for his role as Glenn in AMC's hit TV series, The Walking Dead. He is currently living in L.A.