Kevin Costner’s epic Western film, *Horizon: An American Saga – Chapter 1*, is now available for streaming on Prime Video as of May 23, 2026, marking its first release outside HBO Max.
Why it matters: Costner’s film, which spans the American Civil War from 1861 to 1865, seeks to engage a wider audience after struggling in theaters. The shift to streaming could revive interest in this ambitious project.
- *Horizon* debuted at the Cannes Film Festival in May 2024 before its theatrical release in June 2024.
- The film faced financial challenges, grossing only $38.7 million against a production budget of $100 million.
- Costner personally invested $38 million into the project, one of the largest contributions by an actor-director in recent history.
Driving the news: The film's transition to Prime Video aims to capitalize on the platform's vast audience, where it can potentially find success that eluded it in theaters. This move reflects a growing trend of films finding new life on streaming services.
- With a runtime of 173 minutes, *Horizon* offers viewers a lengthy exploration of the Civil War era.
- The film features a star-studded cast, including Sienna Miller, Sam Worthington, Giovanni Ribisi, and Jena Malone.
- Critics have noted that the film's pacing may benefit from the flexibility of streaming, allowing viewers to engage with its detailed storytelling at their own pace.
State of play: The film's mixed reviews, holding a 51% rating on Rotten Tomatoes and a 6.6/10 IMDb score from over 45,000 users, highlight its polarizing reception among audiences and critics alike.
- Costner's *Horizon* combines action, drama, and social commentary, examining the lives of settlers, soldiers, and Native Americans during a tumultuous time in U.S. history.
- The film aims to depict a divided nation grappling with its identity through multiple intersecting storylines.
- Its theatrical performance raised concerns about the future of the planned four-part saga, leading to the indefinite delay of Chapter 2.
The big picture: The transition to Prime Video reflects a broader industry trend where films that underperform in theaters find renewed life in the streaming arena.
- Streaming platforms like Prime Video offer lower barriers to entry for audiences, potentially boosting viewership metrics significantly.
- If *Horizon* performs well on streaming, it could influence decisions on how to release future chapters, possibly favoring direct-to-streaming models.
- Chapter 3 is reportedly in active production, with Chapter 4 still in development stages, contingent on the success of the first chapter on streaming.
What they're saying: Costner has expressed his commitment to the project, viewing it as a passion project that reflects his fascination with American history.
- “In the great tradition of Warner Bros. Pictures' iconic Westerns, *Horizon: An American Saga* explores the lure of the Old West and how it was won—and lost—through the blood, sweat, and tears of many,” reads the official synopsis.
- Industry observers believe that the film's streaming metrics will be closely monitored as indicators for future installments.
- Critics have praised the film's cinematography and production design, which effectively captures the vastness of the American West.
By the numbers: The financial details surrounding *Horizon* are notable, emphasizing the risks associated with high-budget independent films.
- Total budget for Chapters 1 and 2 is $100 million, with $38 million personally funded by Costner.
- The film grossed $38.7 million domestically during its theatrical run, raising concerns about its commercial viability.
- With a runtime of nearly three hours, the film's length poses challenges and opportunities in both theatrical and streaming formats.
What's next: As *Horizon* finds its place on Prime Video, attention will turn to its performance metrics in the coming weeks.
- Executives may reconsider the distribution strategy for Chapter 2 based on viewer engagement and feedback from streaming audiences.
- Costner continues to balance multiple projects, including potential extensions of his successful series *Yellowstone*.
- As of May 31, 2026, another of Costner's films, *Dances with Wolves*, is set to leave Prime Video, marking a shift in the platform's Western offerings.
With *Horizon: An American Saga – Chapter 1* now streaming, audiences can explore Costner's ambitious vision for the American West and its complex history. The film's themes of national division and resilience resonate in today's polarized climate, offering a historical perspective on enduring American struggles.