Sam Elliott and Aidan Turner are the stars of “The Man Who Killed Hitler and Then the Bigfoot.”

TURNERS FALLS — The movie filming in Montague next month — “The Man Who Killed Hitler and Then the Bigfoot” — will be holding an open casting call for extras this Saturday at the Great Falls Discovery Center in Turners Falls.

The open call will run from 1 to 6 p.m. at the Discovery Center at 2 Avenue A. Those interested do not need to bring head shots.

The movie received approval from the Montague Selectboard to film in certain locations around town starting at the end of July into Sept. 1.

The film is a period piece set in both 1943 and 1987. It stars Sam Elliott and Aidan Turner. Elliott is well-known to audiences from many films, including the current release, “The Hero.” He’s also starring in Netflix’s “The Ranch.” Turner is known for his role as the dwarf Kili in “The Hobbit” series as well as the BBC series “Poldark,” which airs on PBS in America.

According to Deadline Hollywood, the film is the story of a legendary World War II veteran who went across enemy lines to kill Hitler. Decades later, he has settled in New England, when he is asked to lead a hunt for Bigfoot, carrier of a deadly plague hidden deep in the Canadian wilderness.