If it's not too late, don't do that. Beautiful movie made visually underwhelming by the 3D process. I swore I'd never see another 3D movie, but was dragged to this due to time constraints. About 15 minutes into it I took the glasses off just to get a little luminance back on the screen.
Anyway, stunning and emotional adaptation of an unfilmable novel. Go see, but not in 3D.