I was quite taken with Nathaneal Saleh and Joel Dawson in Mary Poppins Returns. I was impressed with their skills. Unfortunately I can't find any information on their ages so I don't know exactly whom to recommend them for. I think Nathaneal would be good for Peter, Edmund, or Eustace if the age worked out. It is so tricky with boy actors as one has to worry about voice changes and such. I think Joel could do a great Caspian or Shasta.

Edit: I like the picture of the suggestion for Miraz but not Caspian. I want a Caspian with a more innocent and wistful, dreaming look.

So, I have another suggestion for King Frank; what about David Tennant? He's older than I thought Frank should be, but to me he has the right look and personality. I feel like he could create a really dimensional and deep character, both before and after the transformation to King of Narnia.

Now that I think of it, Peter Capaldi would make a fabulous Uncle Andrew.

So, I have another suggestion for King Frank; what about David Tennant? He's older than I thought Frank should be, but to me he has the right look and personality. I feel like he could create a really dimensional and deep character, both before and after the transformation to King of Narnia.

Now that I think of it, Peter Capaldi would make a fabulous Uncle Andrew.

Oh, man, I’m so torn on these suggestions XD mostly because I don’t know if I could separate either of them from Doctor Who. I like both these actors and I really think Capaldi is very capable of playing Uncle Andrew well.

I wouldn’t mind a Viking slant on the Telmarines. I could see someone like Gerard Butler playing Miraz. And I know she’s young-ish, but I could see Karen Gillan as Prunaprismia. And if for some reason they decide to go with a younger Miraz, Jude Law or Luke Evans could also pull it off.

I think Peter Capaldi is good at playing older men with craggy faces - he is only in his 50s you know! And he does wild crazy people pretty well.

David Tenant as Frank? I think his face is too thin, but probably only because the cabby in Pauline Baynes' illustrations is a bit rounder in the face.

Dream Cast: Sons of Adam...

No idea yet. Apologies.

Still, I’d like the new young actors to be close to the ages that Lewis suggested in his Narnia timeline (when they are first cast).

I hope that they don’t outgrow their roles after 3 or 4 stories like with the movies (even though television has the inverse: the actors might be too young by the time the series ends...). Still, here are my two cents...

Digory (MN): 12-14 years old

Peter (LWW): 13-15 years old

Edmund (LWW): 10-12 years old

Shasta (HHB): 14-16 years old

Caspian (PC): 15-17 years old

[...He’s 13 in the book. I want an older teen actor here so as to be close in age to Peter (Peter is 14 in the book), and also I want him to reprise his role in the next story, rather than being later replaced by an older actor...]

Eustace (VDT): 9-11 years old

Tirian (LB): 20-22 years old

[...He’s 20-25 in the book, so this works...]

How about Adrian Dunbar as Uncle Andrew? He's got the sort of feverish eyes that I always imagine the character having, plus he's played an evil uncle at least once before, to my knowledge...

Random brainwave I had the other day:

Sullivan Stapleton as Drinian.

Roman Griffith Davis from Jojo Rabbit could make a fantastic Eustace.
He can play brattiness very well, and definitely has the dramatic chops.

I have recently had a hot take on who should play the Professor.

Bear with me on this one - Graham McTavish.
He's Scottish, but is very natural with an English accent. Based on the interviews I've seen him do, he's got that twinkle in his eye and the aura of a storyteller which I've always imagined the professor to have in the book.

He'd be completely believable as someone who had been to a magical world yet was good at keeping it on the DL around people who didn't know - the fine line between seriousness, and remaining a kid at heart, all without being too eccentric. I recently read the professor's closing monologue at the end of LWW in his voice and it fits perfectly.

Yes, he was in the Hobbit. Balin, I think his role was (or was it Dwalin? I get my Middle Earth Dwarves mixed up).

Anyone for Lewin Lloyd as Eustace? He has less in his portfoilo than other actors that have been named but he seems to have a look that could fit Eustace. Also, since he has been in very little projects up till now, Narnia could easily be his huge break. I like the lesser known actors for Narnia.

I think for Magician’s Nephew, if they were OK with ageing the characters up like they did in the Walden films, Asa Butterfield might be a good fit for the role of a teenage Digory Kirke. I’ve been speaking in another forum regarding if Netflix brought in the Walden films (at least the first two) as part of their canon and only adapted the other books that hadn’t been done yet. If this were the case this casting would be interesting because I think Asa Butterfield has a young Jim Broadbent-like quality to his appearance and so he could pass as a young Professor Kirke quite well. For Polly, on the other hand, I have no clue who could play her. Any suggestions?

I recently rewatched the 2012 adaptation of Great Expectations and came to the conclusion while watching that I think Ralph Fiennes would be an interesting choice for Uncle Andrew Ketterley. I think he could easily balance the cruelness and eventual kindness, while naturally performing the transition.

I like the idea of Matthew Goode (The Crown, The Imitation Game) for Professor Kirke. 

I think he's got this very commanding sort of presence: stern but kind hearted, wise but not elderly. He also expresses intellect well and carries himself as one might expect an Oxbridge graduate and University Professor coming into his academic prime (early 50s).

As mentioned by @coracle it would be nice to see a Professor who actually looked like a currently active member of British Academia, not a retired old wizard in his late 70s.

Ooh, I like that possibility as well @icarus. I don't really know about his acting, but something I feel really strongly about for the Netflix adaptation is that the Professor needs to feel like an intellectual heavyweight. I enjoy Jim Broadbent in Walden's LWW, but he is far too gentle and eccentric (admittedly part of that is due to the script).

On the other hand, Matthew Goode seems really young to play the Professor at just 42, but that was about the age that Lewis was when children came to stay with him and his brother and Mrs. Moore during WW2. Honestly, I can picture him being cast to play Lewis in some sort of Inklings-era biopic film.

I'm still personally more into the idea of Charles Dance being cast as Professor Kirke. While the actor is obviously 74, and much older than the character would be in The Lion, The Witch and the Wardrobe, I just think he'd be the best person for it - being able to handle the duality of a role like Professor Kirke, and think he'd really pull of the scene between himself, Peter and Susan.

If not, I think his voice would be an interesting choice for Aslan, although I know a lot of people also want a younger, less intense voice for Aslan.