By Wendy Mitchell
Updated August 05, 2009 at 04:29 AM EDT

Dodge City is heading from TV history to the big screen, as CBS Films is developing a feature film based on Gunsmoke. The Hollywood Reporter reveals that National Treasure: Book of Secrets writer Gregory Poirier will write the screenplay and Craig Baumgarten (Shattered Glass) will produce. Poirier is close to finishing the first draft of the script.

The project is described as being set in the American West made famous in the TV series, but with a contemporary look and action sequences to appeal to modern audiences. Gunsmoke is the second longest-running primetime TV series (after The Simpsons), running from 1955-1975 and making household names of Marshal Matt Dillon, Doc Adams and saloon owner Miss Kitty.