Kevin Costner’s Epic Western Flop Saddles Up for a Second Chance on Streaming

Kevin Costner is back with another sweeping western—but this time, his pet project Horizon: An American Saga – Chapter 1 is riding onto Amazon Prime Video later this month, despite its less-than-stellar box office run. If you missed all the drama around this epic (and yeah, there was plenty), here's the rundown.

Big Gambles, Bigger Ambitions

Let's talk about ambition for a second. Costner's not just starring in this thing—he wrote the original concept himself, way back in 1988. It bounced around Hollywood for decades. Disney almost bit in 2003, but when they lowballed him by $5 million, Costner just packed up his ten-gallon hat and left. Fast-forward to 2012, he teamed up with Jon Baird and finally hammered out a script that got the green light.

Costner also put his money where his mouth is, sinking a whopping $38 million of his own cash into Chapter 1, and producing through his company, Territory Pictures. Total budget for just the first movie? $100 million. And hang on—he didn’t stop there. Not only did he film Chapter 1, he shot Chapter 2 immediately after, with another $100 million price tag.

What’s the Movie Actually About?

Horizon: An American Saga – Chapter 1 juggles several storylines, all set against the backdrop of the American West before and after the Civil War. If you’re into sprawling, multi-threaded dramas, this one goes all in:

• Settlers vs. Apache: One plot has a group of settlers trying to found a town called Horizon out in Arizona territory. No surprise, they run straight into violent conflicts with the local Apache people, who are (understandably) defending their land.
• The Runaway: Elsewhere, Lucy and her young son Sam are on the run after Lucy shoots a man up in the Montana Territory—she ditches her old name and tries to start fresh as 'Ellen.' Cue the classic pursuit: the dead man's sons set off to hunt her down.

The cast is stacked: Sienna Miller, Sam Worthington, Jena Malone, Michael Rooker, Giovanni Ribisi, Jamie Campbell Bower, and Abbey Lee all show up to wrangle, scheme, or shoot at someone.

Mixed Results and Where You Can Watch

So, how did all that turn out? The movie dropped in theaters on June 28, 2024, and... didn’t exactly light up the box office. It pulled in $38.8 million worldwide—not great when you consider the $100 million budget. Reviews weren’t much warmer: 51% on Rotten Tomatoes from critics, but the audience score was a bit kinder at 70%.

Speaking of sequels, Chapter 2 actually premiered at the Venice International Film Festival, but thanks to the first movie’s tepid performance, its wide release has been indefinitely delayed. Rumor has it that Costner’s already filmed a big chunk of Chapter 3, too, so he’s apparently all-in on seeing this saga through—whether or not audiences are clamoring for it.

So, Prime Video—Why Now?

And that brings us to the streaming news: Horizon: An American Saga – Chapter 1 will finally hit Amazon Prime Video on May 23, 2026. It might not have broken the bank or pleased all the critics, but if you’re curious to see what happens when an Oscar-winner risks his own fortune chasing a decades-old dream, this is your chance.

'I had this idea for years. I just couldn’t let it go.' (That’s Costner, basically admitting he willed this massive western into existence.)

So, if you’re in the mood for a western epic with a side of Hollywood what-happened-there, look out for Costner’s latest ride into the streaming sunset.