According to EW, Mackenzie Foy is close to signing a deal to play Renesmee:
"It’s a big day for Twihards. First Maggie Grace signs on to play Irina. Now EW.com has learned that little 9-year old Mackenzie Foy is inches away from signing on to play Renesmee, Edward and Bella’s vampire/human love child that’s a central role in the final installment of The Twilight Saga: Breaking Dawn."
For more info from EW click here, including the possible digital effects similar to those used in The Curious Case of Benjamin Button, that could be used in filming.You can also check out Mackenzie Foy's website here.So what do you think Twifans???SOURCE