Kevin Costner, Sienna Miller attend 'Horizon' premiere in Los Angeles
Updated June 25, 2024 with 21 photos
Kevin Costner, Sienna Miller, Sam Worthington and Luke Wilson attend the premiere of "Horizon: An American Saga - Chapter 1" in Los Angeles on June 24, 2024. Costner stars, co-wrote, produced and directed the historical drama, which comes to theaters on June 28, 2024. The second installment arrives on August 16, 2024.