I'm participating in the Book Spooks "Cast Your Villain" Feature
My favorite (or least favorite, I guess) villain is Sileph from Enna Burning. But I just couldn't find anyone to do him justice. So I went for Selia from The Goose Girl.
I chose Dianna Agron (of Glee fame) purely on her looks. I don't know if she has what it takes to be as evil as Selia. She can be bratty, but I'm not sure if she can be evil. I'm excited to see her play Sarah in I Am Number Four coming out in February.