I mostly started the thread because there's very little description for many of these characters. "Casting" it is a way of sharing how other people picture them see them, whether they can name the face or not
Still, I can't quite believe you've
never seen any film or TV show or anything and thought 'They remind me of X', you don't even need to know the name of the person, if you can remember the character
Here's some of mine:
BerenBrad Pitt (a' la Legends of the Fall)
Like, Aragorn I always think of Beren as someone traditionally very masculine looking: square jaw, broad shoulders, hairy chest etc. I'd like to imagine that Beren looks completely alien to Luthien when they meet and he has to look physically strong and project mental strength too. I really like how wild, but noble Brad Pitt looks in Legends of the Fall. Incidentally, I find Luthien really difficult to picture- because she's the most beautiful woman ever and all that!
Elladan &/ Or ElrohirAidan Turner
I don't usually like it when I've seen fan-casts and a member of the current cast is put in an alternative role, it seems kind of lazy and often a bit weird. But try as I might, since seeing the above artwork I can't think of anyone better than Aidan as one (or both) of Elrond's sons.