Pride and Prejudice and Zombies: Cast It!

I just finished reading Pride and Prejudice and Zombies today, and I have to say I was rather disappointed by it. Where I had hoped for great comedy and plenty of zombies, it lacked both, with most of the jokes falling flat and the "unmentionables" disappearing for the most part in the second half. Of course, the mash-up genre has mostly been a flash-in-the-pan, with diminishing returns with every new book.

The inevitable movie is in development, though, set for release in 2011 with rumors stating that David O. Russell is directing and Natalie Portman will be playing the role of Elizabeth Bennett. Of course, these are just rumors, as the film has no official director or stars...or writer....or even a real release date. Here's my question: who would you hire? Here's the main characters:

Elizabeth Bennett: the second-oldest daughter of Mr. and Mrs. Bennett. Prefers killing zombies and training in martial arts that she learned in China than love, and regards her own honor over those of others.

Mr. Bennett: The father of Elizabeth. Himself a martial arts master, though in his old age he's not nearly as nimble as he once was. He has an immense love for Elizabeth, and values their training greatly.

Mrs. Bennett: The mother. She's a ghastly woman who only wants her daughters to be married; anyone will do.

Mr. Darcy: A friend of relatives to the Bennetts. He's pompous and trite, drawing the ire of Elizabeth.

Colonel Whickham: At first a potential love interest for Elizabeth, some dark secrets about his past are eventually revealed. Charming in a non-threatening way.

Lady Catherine: Darcy's aunt. She is a master zombie killer, having served the Queen in fighting the scourge. She is sour, cold-hearted, and arrogant, with little regard for Elizabeth and her low status.

Personally, I'd cast Portman as Elizabeth, Richard Jenkins as Mr. Bennett, Imelda Staunton as Mrs. Bennett, Tom Hardy as Mr. Darcy, Michael Fassbender as Whickham, and Susan Sarandon as Lady Catherine. And of course, it would be directed by Edgar Wright.

Who would you cast? Discuss in the comments.