Everyone knows sexy vampires are cool, and will remain cool indefinitely. It is with this in mind that director Neil Jordan is embarking on his latest project, Byzantium. And the lead sexy vampires have already been cast: Saoirse Ronan (Hanna) and Gemma Arterton. "But how are the two sexy vampires related to each other?" you're asking yourself right now. Lucky for you, the answer is in this ploy synopsis:
"[Byzantium] details the story of a mother vampire who turns her own daughter into a vampire and the pair form a lethal partnership, sometimes posing as sisters."

The original script is apparently based on a "youth theater play" (whatever that is), but according producers the movie is going into a "more adult, darker level." So be warned: These aren't just sexy vampires, these are really sexy vampires. (The Hollywood Reporter)