The Walking Dead's Steven Yeun on Glenn as New Group Leader: 'He Needs to Step Up'

Three seasons in, and The Walking Dead‘s Steven Yeun is finally starting to get that his show is kind of a big deal.

At Comic-Con, Yeun swung by to talk about how even a recent jog turned into a wake-up call about the AMC drama’s insane amount of devoted fans. READ MORE & WATCH VIDEO