Caspian with facial hair?

I hope that title got your attention! :P

You want might want to have a look at this interview, in which Ben Barnes talks about The Voyage of the Dawn Treader from roughly 3:22 onwards. He has grown his hair down past his shoulders in readiness for shooting VOTDT, and. . . what's up with the whiskers? It would appear King Caspian will be sporting a beard, as well as the long hair, in the next Narnia film. You might think it's silly to be making all this fuss about it, but remember that in the books Caspian is kind of too young to even have a beard. . . :-/

Here are some recent photos of Ben promoting his latest film:

With co-stars Jessica Biel and Colin Firth. Seriously, that hair worries me. . .