Kevin Costner, Sienna Miller attend 'Horizon' premiere in Los Angeles (21 images)

By Wade Sheridan

Kevin Costner, Sienna Miller, Sam Worthington and Luke Wilson attend the premiere of "Horizon: An American Saga - Chapter 1" in Los Angeles on Sunday. Costner stars, co-wrote, produced and directed the historical drama, which comes to theaters on Friday. The second installment arrives on August 16, 2024.

Writer/director/producer and cast member Kevin Costner attends the premiere of western drama "Horizon: An American Saga - Chapter 1" in Los Angeles on June 24, 2024. Photo by Jim Ruymen/UPI

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Cast member Sienna Miller. Photo by Jim Ruymen/UPI

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Cast member Sam Worthington (R), and his wife, Lara Worthington. Photo by Jim Ruymen/UPI

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Cast member Luke Wilson. Photo by Jim Ruymen/UPI

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