Each member of the wolf pack had to have papers proving their Native descent. Chaske Spencer is Lakota (Sioux), Bronson Pelletier is Cree-Metis, Alex Meraz is Purepecha (Tarasco), Kiowa Gordon is Hualapai, and Tyson Houseman, who was discovered at an open casting call, is Cree.
(at around 1h 30 mins) Just before Jacob almost kisses Bella, he says "Kwop kilawtley", which means "stay with me forever" in Quileute.
The Italian sequences were shot over a period of four days. Red was deliberately kept out of the colour palette until the Italian sequences.
After months of speculation and rumors, director Chris Weitz and the novel's author, Stephenie Meyer, confirmed on her official website that Taylor Lautner would be reprising his role as Jacob Black. It was doubted as the filmmakers feared he would not be able to become fit enough in time. However, he was given the go-ahead after gaining 26 pounds of muscle.
(at around 17 mins) While Carlisle is cleaning Bella's wounds after the party, when he burns the blood-soaked gauze, the gauze forms the flower that is present on the New Moon book cover. This is similar to what Melissa Rosenberg did in Twilight (2008), when Edward caught the apple that Bella dropped in the cafeteria.