Development

In early November 2008, Summit announced that they had attained the rights to the remaining books in Stephenie Meyer's Twilight series: New Moon, Eclipse, and Breaking Dawn. In February 2009, Summit confirmed that they would begin working on Eclipse. On the same day, it was announced that since New Moon director Chris Weitz will be in post-production for New Moon when Eclipse begins shooting, he will not be directing the third film. Instead, Eclipse will be helmed by director David Slade, with Melissa Rosenberg returning as screenwriter.

Casting

Bryce Dallas Howard will be replacing Rachelle Lefevre as Victoria. Summit Entertainment attributed the change to scheduling conflicts, and Lefevre responded that she was "stunned" and "greatly saddened" by the decision. Jodelle Ferland has been cast as the newly turned vampire, Bree. Other new cast members include Xavier Samuel as Riley, Jack Huston as Royce King II, Catalina Sandino Moreno as Maria, Julia Jones as Leah Clearwater, and Boo Boo Stewart as Seth Clearwater.

Filming

Principal photography began on August 17 and is expected to run until October 31, 2009 at Vancouver Film Studios.