Based on a 2006 graphic novel by Scott Mitchell Rosenberg and directed by Iron Man's Jon Favreau, the movie also stars Daniel Craig, Sam Rockwell, Clancy Brown and Olivia Wilde. With Steven Spielberg as an executive producer, the film is released in UK cinemas on August 12.
Ford plays Colonel Woodrow Dolarhyde, who rules the town of Absolution. He and Spielberg decided the character wouldn't wear a cowboy hat because it would remind audiences of the Indiana Jones films.
The 68-year-old actor, promoting his new film Morning Glory, which is released on Friday, January 21, says he had a blast making the movie.
"I haven't made a Western for 30 years and it was a pleasure. I enjoy being outside on a horse most of the day. It was nothing but good fun and I'm looking forward to the film, I think it's going to be quite good."
Ford might also be back playing Indy again in a possible fifth instalment and confirmed he is keen on returning to the adventure franchise. He said:
"If there's a good idea, I'd love to play that character - and I'd love to work with George [Lucas] again."
Harrison Ford insists he will make himself available for Indiana Jones 5, if script plans are agreed between George Lucas, Steven Spielberg and the actor himself. The fourth installment - Indiana Jones and the Kingdom of the Crystal Skull - was released in 2008 and was set in 1957.
A fifth film would be unlikely to start filming before 2012, a year in which Ford will turn 70, and is expected to focus more on Indiana Jones's relationship with his son Mutt Williams, who is played by Shia LaBeouf.
LaBeouf said recently:
"They’re script writing right now. I got called into Steven Speilberg’s office and he pitched a little bit to me and it sounds crazy, it sounds really cool.”
Lucas has admitted they are working on a story "to see if we can get to a point where everyone likes it."