I'll have to watch the movie after reading the book. Quite a star studded cast! All though I would have probably cast Malkovich as Ralph Touchett, not Gilbert Osmond, even if Malkovich is more Osmond's age. I'm not convinced of the casting in general -- Richard E. Grant as the dashing Warburton? Christian Bale as the insecure Edward Rosier? Kidman wouldn't have been my first choice either. It also seems that the movie focuses largely on the second half of the novel, whereas I was more interested in the first half.
I really enjoyed the interplay between Ralph Touchett, Lord Warburton and Isabel Archer, with the looming presence of Ralph's parents. The second half becomes too prosaic in my mind, with Isabel making what appears to be the wrong choice in Gilbert Osmond. Really hard to figure out what she sees in him, given the unknown narrator's description, other than he appears to give her the room she desires, whereas Warburton and Goodwood appeared to smother her with their love declarations, and Ralph was too fragile a person to fulfill her desires.
Anyway, it will certainly make for an interesting discussion, as Henry James offers a painstaking analysis of each character, although he seemed to keep Gilbert Osmond at a distance for reasons that I hope to discover later.