'Twilight Breaking Dawn': Mackenzie Foy may play Renesmee

kristen-stewart-mackenzie-foy-robert-pattinson-500.jpg Robert Pattinson and Kristen Stewart can practically hear the patter of little half-vampire feet.

The "Twilight: Breaking Dawn" casting of their on-screen daughter Renesmee is well underway, and according to an EW report, Mackenzie Foy is the lucky little girl to join the supernatural franchise.

Who's Foy? She's a nine-year-old actress who's appeared on the TV show "FlashForward" and "'Til Death." Other than that, she seems like a relative unknown.

More spoilers ahead!