Exclusive: The writer/director/producer/star of the four-part film series detailed his inspiration in the foreword for "The Great Horizon: Photographing Kevin Costner's 'American Saga.'"

Kevin Costner wrote, produced, directed and stars in the ambitious but roundly-panned four-part film project, "Horizon: An American Saga." ©Warner Bros/Courtesy Everett Collection We need to talk about Kevin. When seen earlier this month in the return of ...

Kevin Costner has pumped a lot of his own cash into his Horizon: An American Saga franchise. But is that enough to save his Western movies?

Odds are you've heard of "Yellowstone," which has become a massive hit on television over its past five seasons. It's so popular it's already spurred multiple splashy prequel shows, with creator Taylor Sheridan involved in all the shows.