Article continues below advertisementTension boiled over between Kevin Costner and Wes Bentley on the set of Yellowstone, with the clash leaving their costar Kelly Reilly in tears.The previously unreported incident between Costner, 70, and his onscreen children, Bentley, 47, and Reilly, 48, was over a script dispute and was revealed by a news outlet on Wednesday, October 8.Article continues below advertisementKevin Costner and Wes Bentley Got in On-Set AltercationSource: MEGAKevin Costner and Wes Bentley reportedly got into an altercation on the set of 'Yellowstone.