Kevin Costner EXPLAINS Yellowstone Exit: Time to Move On (Exclusive)

Kevin Costner sat down with “Extra’s” Billy Bush to talk about his new Civil War-era Western “Horizon: An American Saga,” a four-part project that he spent $38 million of his own fortune to make. The first chapter is in theaters June 28 and follows a group of pioneers led by Sienna Miller, Sam Worthington, and Luke Wilson as they battle for life in the American West. Kevin also opened up about his decision to move on “gracefully” from “Yellowstone” and being “proud” of what he was able to do with it. Plus, he spoke about the royal dream he had once hoped to make come true — getting Princess Diana to make her film debut in a sequel to “The Bodyguard” with Whitney Houston.