I think Max Records would be a great Peter , even though he is American. I saw him in Where the Wild Things Are, and he was great in it. (Sorry, I don't know of many British child actors, but let's assume they could pull one off.)

http://www.imdb.com/name/nm2504006/

I can imagine a Narnia without the current kids very well actually. I find it a bit annoying actually when people are complaining "We just can't do a Narnia reboot without so and so in it. It would be terrible." Really?

Anyways, here is another British child actor suggestion. How about Holly Bodimeade as Susan? http://www.imdb.com/name/nm2733218/

Edmund or Peter: Asa Butterfield? http://www.imdb.com/name/nm2633535/

Lucy? I have no idea.

For Susan I would pick the girl who plays Angus's older sister in "The Water Horse"

Sorry, don't know her name.

BUT! That's only based on the assumption of a reboot...no one could replace Anna Popplewell. Ever.

Anna Popplewell has the right look for Susan but can be easily replaced because of the big character change and believe a future actress can replace her by playing Susan the way she should be portrayed.

I can't think of any actress at this moment who could portray Susan. Imogen Poots is the ideal person I imagine Susan to look like: http://www.imdb.com/media/rm1860680192/nm1782299 She is very gorgeous and if the movie would reboot an actress who looks like her would do.

Alex Etel would be a great Peter and he is the right age and look to portray him if there was a reboot: http://www.imdb.com/name/nm1375020/

And even though I'm rooting for this actor to play Digory I can see him portaray a really good Edmund: http://www.imdb.com/name/nm2633535/ he's super adorable!!

And this girl for Lucy: http://www.imdb.com/name/nm2890526/

Hah, it's funny that two of you should suggest Asa Butterfield already. I wanted him so bad as Eustace, and then so bad as Digory...now it looks like he'll never be in a Narnia movie...*sniff*

How about this girl for Lucy? Olivia Hancock:

Or this kid for Edmund? Dmitri Schuyler-Linch:

And I thought of Max Records for Peter, too! But I also like the idea of Bill Milner in the role:

It might be interesting to see Saoirse Ronan as Susan.

~Riella

Saoirse Ronan would be awesome as Susan.

I think a lot of the reason so many people don't want to recast is because they have a hard time reshaping their mental image of the characters. As in, Susan doesn't actually look like Anna. It'd be fun to see a blond Susan, like in the BBC versions. Or even, a blond Edmund!

Okay, blond Edmund's a bit too far of a stretch for me.

Saoirse Ronan would be the ultimate Susan!! 100% agree with you Ithilwen. Ironic I rewatched The Lovely Bones last night and I actually thought about that

I think it would be fun and actually have a Lucy who had blond hair like in the book.