Kevin Costner's kids showed up to support their dad's passion project, Horizon: An American Saga, which premiered in Los Angeles. Costner attended the event with five of his seven children, including sons Joe, Cayden, and Hayes, and daughters Annie and Grace. The family made the premiere a delightful affair, smiling and posing together on the red carpet. This four-part cinematic project is a culmination of Costner's three decades of dedication. The movie received an 11-minute standing ovation at the Cannes Film Festival, a moment that moved Costner to tears in front of his children. The film, set in the pre-and-post-American Civil War period, is an epic Western project that has been a labor of love for Costner. Chapter 1 of Horizon: An American Saga will hit theaters on June 28, with the star expressing gratitude for the opportunity to share his work with his family and the world.