Sienna Miller stars as Frances Kittredge and Sam Worthington as Trent Gephart in the four-part Western saga. The two are joined by Luke Wilson, Abbey Lee, Jena Malone and Giovanni Ribisi. "Horizon" also stars Costner, who wrote and directed the four films. The 69-year-old actor backed the saga with his own money after deeming it a passion project nearly 30 years ago.
Sienna Miller and Sam Worthington star in Kevin Costner's 'Horizon: An American Saga'
"I know they say I've got $20 million of my own money in this movie," he previously told GQ magazine. "It's not true. I've got now about $38 million in the film. That’s the truth. That’s the real number."
As the first "Horizon" film is set to hit theaters, Costner has officially turned his attention solely onto the saga – leaving his "Yellowstone" character John Dutton behind.
Costner explained he left "because there's just too many questions about it."
"So the time to step away was now," he told Fox News Digital.
Through his deal with FOX Nation, Costner is set to release a new project in 2025 for the platform and previously hosted "Yellowstone: One Fifty," a series that explores the origins of the national park.
