Which film about open range cattlemen in Montana, U.S. in the 1880s, starred Kevin Costner and Robert Duvall?

The film ‘Open Range” was released in 2003 in the United States and then in the United Kingdom the following year. It was a box office success and was critically acclaimed, realizing $68.3 million on a budget of $22 million USD. Running for 139 minutes, the film starred both Kevin Costner (born 1955) and Robert Duvall (1931) in an American Western, as open range cattlemen in the late 1880s in the state of Montana, U.S.

The film won the 2004 Western Heritage Award and was nominated for a Golden Satellite Award, an MTV Movie Award, a Motion Picture Sound Editors Award as well as a Taurus Award for stunt artist Chad Camilleri. The movie was filmed on location on the Stoney Indian Reserve in Alberta, Canada.

It was directed and co-produced by Kevin Costner, based on the book by Lauren Paine (1916-2001) titled ‘The Open Range Men’. She was an American writer of Western fiction. Costner grew up reading her western romance novels and was inspired to make the film ‘Open Range.’

The film involves the conflict between open range cattlemen and a ruthless Irish immigrant land baron who hates open-rangers.

‘The Cowboys’ was a 1972 film that starred John Wayne and cowhands hired to drive a herd to market on time, but the rough drive is full of dangers and a gang of cattle rustlers.

‘Cattle King’ is a 1963 film that depicts a rich landowner of Wyoming who fights to prevent the Texas herds from trampling his rich meadows.