Well if they use twins then one would get jelous of his brother cuz he is Shasta and is on screen for a long time while the one playing Cor is in for a couple scenes...

I think the twins should be played by one actor if they're going to be identical. If they just look very similar, then they could be played by twins, or just boys who look a lot like each other. But since Edmund thinks Shasta is Corin, they should be identical.

i agree with you daughter of the king! 1 actor should be used for Shasta and corin!

But if Cor and Corin are identical, then that gives the hole plot away instantly!
Lewis wrote:

Shasta had never seen his own face in a looking glass. Even if he had, he might not have realized that the other boy was normally almost exactly like himself.

(HHB, emphasis added)

The twins are reasonable look-alikes, not identical.

no cuz you don't see them until the middle and at the end...

They don't have to be exactly alike, but both Edmund and King Lune think Shasta is Cor when they first see him. Besides, it's obvious that they must be related as soon as Cor climbs in the window. Even if you aren't really thinking about it, the plot is a give away. Shasta knows he's from up north and has no clue who his father is, King Edmund thinks he's the prince of Archenland, King Lune(his father!) thinks Shasta is Cor when he runs up with the news, the audience will know, or at least they will suspect it.

I think with the fact we have parent trap movies out there, the audience would figure it out. I am still going for twins.

That would be great, so long as they are not exactly identical.

I agree with you, Eustace--Twins. Exactly identical twins, I vote, or something very close. If Corin's own father could mistake the two, then no doubt they are very, very, close to being identical. And I don't really think that the audience it supposed to be surprised at the fact they turn out to be brothers--it's very obvious, much like finding out that the Black Knight in SC is Rilian.
Plus--and I've made this argument before, though no one listens to me--It would be much easier on the actor(s) if the parts were played by two boys rather than one.
I think both brothers should have fair hair, and I always imagined them with brown eyes. Cor, of course, will be darker than Corin.

Well if there is 1 actor you can propbly make him look diffrent when you shoot scenes with Corin...but i honstaly think Shasta and Corin should be played with 1 actor... like the parent trap

But in "The Parent Trap", it's supposed to be obvious from the get-go that the girls are related. This is different; there's a note of mystery here. Oh, and I like the idea of fair hair and brown eyes, ChristProclamer.

Umm, I like the idea of there being some mystery, Dernhelm_of_Rohan, but I just don't see how thats possible. As daughter of the king said Shasta knows he's from up north and than all of the sudden King Ed mistakes hem for Corin who just happens to have a missing twin(we don't know this yet but come on...). I really don't think the plot will be too mysterious. Up until Tashbaan it's pretty mysterious, he doesn't know who he is or to whom he belongs, but as soon as we get there things start to fall into place.

Identical twins would be good since Shasta has to fool all the Narnian court, but semi identical would be fine too. Blonde hair and brown eyes sound good but I always thought of Shasta having these steady grey green eyes.

well there can be 1 actor and make him look diffrent when you shoot a scene with Cor like this and make it look like
just as an example