Kevin Costner cast a second of his sons in his new western epic “Horizon: An American Saga.”The 69-year-old “Bodyguard” actor has sons Hayes (15) and Cayden (17) and daughter Grace (14) with his 50-year-old ex-wife Christine Baumgartner. He also has children Joe (36) and Liam (26) with his ex-girlfriends Cindy Silva (67) and Bridget Rooney […]