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Kevin Costner<\/a>‘s\u00a015-year-old son, Hayes, is making his acting debut in his dad’s new movie, <\/span>Horizon: An American Saga<\/span><\/em>.\u00a0<\/span><\/p>\n The trailer for\u00a0<\/span>Horizon: An American Saga<\/em><\/a>\u00a0dropped on Monday, and viewers were quick to notice one member of the cast who bears a stunning resemblance to the film’s star and director.\u00a0<\/span><\/p>\n In the trailer, Hayes stars alongside Sienna Miller and a young actress, who seemingly play his mother and sister, as the trio begins to retreat into the floorboards of a home. After helping to secure the woman and the young girl, the actor delivers his line, declaring he is staying behind.\u00a0<\/span><\/p>\n “It’s all right — I’m gonna be with Dad,” Hayes says, closing a trap door above the two ladies.\u00a0<\/span><\/p>\n Hayes is the second youngest of <\/span>Costner’s seven children<\/a>, three of whom he shares with recent ex-wife <\/span>Christine Baumgartner<\/a>. In total, Costner has four sons and three daughters: Annie, 39, Lily, 37, Joe, 36, Liam, 26, Cayden, 16, Hayes, 15, and Grace, 13. However, the 15-year-old is hardly the first to act alongside his father as Annie, Lily and Joe all worked with their dad on his 1997 film <\/span>The Postman<\/span><\/em>.\u00a0<\/span><\/p>\n The upcoming Western film is Costner’s passion project — an epic that’s been more than three decades in the making — which will come to the silver screen, not just once, but twice this summer.<\/span><\/p>\n In the trailer released on Monday, the gripping opening features Danny Huston — decked out in a Union Army uniform — eloquently delivering an ominous message about what’s to come as miles of wagons make their way west in search for a better opportunity.\u00a0<\/span><\/p>\n “You and I are standing guard in one of the last great open spaces,” says Huston’s character against the backdrop of mountain ranges and shots of Native Americans at the ready for the inevitable clash. “These people think that if you’re tough enough, smart enough and mean enough all this will be theirs someday. There’s no army of this earth that’s gonna stop those wagons coming and lose their want to them.”<\/span><\/p>\n Just then, Costner makes his first appearance in the trailer riding a horse while leading those same wagons across the mountaintop. The trailer then delves into the predictable collision course that occurs in the Wild West, which in Costner’s world means surviving more than just a gunfight. There are inevitable demises caused by nature’s harsh elements.<\/span><\/p>\n Like when Luke Wilson’s character tries his damndest to get his message across as he leads his brood west.<\/span><\/p>\n “All I’m trying to do is get as many of us as I can as far as I can,” Wilson says as he’s later seen burying presumably a loved one who succumbed during the trek.<\/span><\/p>\n Costner acted in, directed, and produced the two-part theatrical event. In an unprecedented move, chapter one will hit theaters June 28, followed by chapter two on Aug. 16. The film stars Huston, Wilson, Miller, Sam Worthington, Jena Malone, Abbey Lee, Michael Rooker, Isabelle Fuhrman, Jeff Fahey, Will Patton, Tatanka Means, Owen Crow Shoe, Ella Hunt and Jamie Campbell Bower.<\/span><\/p>\n