Can someone explain to me how you can take as talented an actress and Natalie Portman, and reduce her to the relevance of a porcelain figurine?

I'm watching Star Wars Episode III. This is the same girl I watched in Garden State a couple of weeks ago, and she lit up the movie with characer. In this she's just a china doll to put obscure hair styles on, and make her say stupid lines. Its a crime.

This is a good story. A little better execution in certain spots would have carried a long way. Not the least of which is a better use of the talented Ms. Portman.