Carter Burwell, the composer who scored "Twilight", and is now scoring "The Twilight Saga: Breaking Dawn" has just confirmed that he has completed writing Renesmee’s Lullaby.
Not only that, but he also confirmed that Robert Pattinson will be playing it on-screen!
Taken from Carter’s "What is New?" Section on his Official Website:
"And he just wrote “Renesmee’s Lullaby” for Twilight Breaking Dawn 2, which Rob Pattinson will play on camera. The film will be released in November 2012."