Arnold Schwarzenegger back in action in "The Last Stand"

(CBS/AP) Just like he promised, Arnold Schwarzenegger is back -- acting, that is.

The former California governor is currently in New Mexico on the set of Kim Jee-Woon's "The Last Stand." The Korean director is best known for his spaghetti western, "The Good, The Bad, The Weird."

Pictures: Arnold Schwarzenegger
Pictures: Arnold at the Arnold Schwarzenegger Museum

"Fantastic first day on the set of The Last Stand. Big thanks to the crew - keep up the great work," he tweeted on Oct. 16. A few days before, he tweeted about a "fantastic time" with Bruce Willis and Sylvester Stallone on the set of "The Expendables 2."

"The Last Stand" is a modern-day western about convicts making their way to the Mexican border through New Mexico after escaping from a Las Vegas prison. Lionsgate, which is producing the film, said Schwarzenegger plays a former Los Angeles police officer who ends up working as a sheriff of a small border town after a botched operation.

The film also stars Forest Whitaker, Johnny Knoxville, Harry Dean Stanton, and Zach Gilford, according to a press release obtained by Entertainment Weekly. The film will be out in 2013.