I really don't know many British Actors/Actresses, so we'll see how they do. They look pretty much like I imagined, (although I hadn't really pictured Kingsley at all). The one that will really tell, is how they do the actress that is playing Mrs. Figg. The picture that I saw of her in another roll, isn't at all like I pictured her. I can see a lot more grey in her hair, and kind of an elderly look about her. A clean, but slightly worn look to her clothes because she's a squib. Hair in a bun type look, I think.
I kind of picture Luna Lovegood as a wizarding world version of Topenga from Boy Meets World. Kind of spacey, but nice, and nice looking.
I think that they did a good job casting Dolores Umbridge. I can see her as Fudge's little toady.
