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* Peter Facinelli as Carlisle Cullen, a compassionate doctor who acts as a father figure to the Cullen coven. He is the one that created the Cullen family except for Alice and Jasper. In early November 2008, Summit announced that they had attained the rights to the remaining books in Stephenie
* Elizabeth Reaser as Esme Cullen, a loving mother figure of the Cullen coven.
* Kellan Lutz as Emmett Cullen, the strongest member of the Cullen family, and provides comic relief
* Nikki Reed as Rosalie Hale, the most beautiful member of the Cullen family.
* Jackson Rathbone as Jasper Hale, a member of the Cullen coven who trains his family to fight newborn vampires and can control/manipulate emotions.
* Billy Burke as Charlie Swan, Bella's father and Forks' Chief of Police.
* Bryce Dallas Howard as Victoria, a vampire who wants to kill Bella to avenge her mate, James.
* Jodelle Ferland as Bree, a newborn vampire who was made by Riley. She is the narrator in the spin-off book, The Short Second Life of Bree Tanner.
* Dakota Fanning as Jane, Loyal servant to the Volturi.
* Xavier Samuel as Riley Biers, part of Victoria's army of vampires.
* Julia Jones as Leah Clearwater, the only female werewolf.
* Jack Huston as Royce King II, Rosalie's former fiancé.
Production
Development
Meyer's Twilight series: New Moon, Eclipse, and Breaking Dawn. In February 2009, Summit confirmed that they would begin working on The Twilight Saga: Eclipse. On the same day, it was announced that since New Moon director Chris Weitz would be in post-production for New Moon when Eclipse began shooting, he would not be directing the third film. Instead, The Twilight Saga: Eclipse would be helmed by director David Slade, with Melissa Rosenberg returning as screenwriter. Summit Entertainment revealed that they would replace Rachelle Lefevre, who played an evil vampire named Victoria, with Bryce Dallas Howard in late July 2009. They attributed the change to scheduling conflicts, and Lefevre responded
Casting