Steven Yeun plays Glenn on the AMC zombie series, The Walking Dead. He was also seen in a co-starring role on an episode of the popular television series The Big Bang Theory. Prior to this, Yeun lived in Chicago where he performed with the famed Second City Theatre in various shows with their Touring Company as well as their NCL Boat Company. Other Chicago theatre credits include understudying the Steppenwolf Theatre's production of Kafka on the Shore, understudying the roles of Kafka and Crow. In addition, he was part of several improvisational/sketch comedy groups including Stir Friday Night, Hands and Detective Detective.