Harris, Mortensen & Zellweger in Appaloosa

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Ed Harris, Viggo Mortensen and Renée Zellweger will topline the Western drama Appaloosa, with Harris directing from the screenplay he co-wrote with Robert Knott.

New Line is on board to distribute and Michael London is producing via his Groundswell Productions, which is co-financing the film. Harris and Knott also are producing. Filming is set to start Oct. 1 in New Mexico.

The project reteams Harris and Mortensen, who worked together on New Line’s A History of Violence. The story is adapted from Robert B. Parker’s novel of the same name, centered on a pair of friends hired to protect a lawless town suffering at the hands of a renegade rancher. The arrival of an attractive widow disrupts their plans.

Appaloosa is the second Western written by Parker, best known for suspense novels. He also wrote “Gunman’s Rhapsody,” a fictional version of the Wyatt Earp story.