Hunnam plays Jax in the FX show Sons of Anarchy. If you haven't seen it, I recommend it. Its very good...though pretty violent, be warned. But what makes the show really successful are the actors. The stories are interesting. The show is well done, but the actors are through the roof. the All these guys give it there all and Hunnam is right there with it.
He's got the look and feel for a King Arthur . . . he sort of plays one in Sons of Anarchy.
Good news all the way around!