Kevin Costner has poured his heart, soul, and $38 million of his own money into the epic western film series, Horizon: An American Saga. The actor, who also directed and wrote the saga, risked his beachfront home worth over $100 million to bring his passion project to life. His dedication has not gone unnoticed by his co-stars, who were inspired to work harder by his commitment. Sienna Miller, who plays a settler in the film, emphasized the motivation to support Costner's dream on set. Despite the risks involved, Costner's willingness to take bold risks attracted actors like Sam Worthington, who appreciate working with a director with a vision. The first two films in the series will be released this summer, with Costner defining success as people wanting to see and share the films.