http://walkingdead.wikia.com/wiki/Carl_Grimes_(TV_Series)
They may just be using the actor's age as a reference but I would think that is reasonable since we don't know and probably never will hear it mentioned. Age doesn't seem to matter much in the ZA. I would thing they would keep things ambiguous due to rapid aging on the show.
Just thought of something. They didn't mention his age in the season 1 finale when they gave him the wine did he?
They may just be using the actor's age as a reference but I would think that is reasonable since we don't know and probably never will hear it mentioned. Age doesn't seem to matter much in the ZA. I would thing they would keep things ambiguous due to rapid aging on the show.
Just thought of something. They didn't mention his age in the season 1 finale when they gave him the wine did he?