Well, Carl has gotten a lot more mature this season…
It was revealed on a recent episode of The Walking Dead aftershow, The Talking Dead, that the stunt double for Chandler Riggs, who plays Carl, is actually a 31-year-old woman named Ashley.
Here's a screencap of all the stunt doubles from The Walking Dead Season 4. It's just blurry enough that it's actually hard to tell!
AMC
AMC
