Grimes previously told PEOPLE he felt the cast was "lucky to have Kevin on the show as long as we did" There's definitely some distance growing between Kevin Costner and his Yellowstone family. Following Costner's exit from the Paramount Network series (which he confirmed in June after months of speculation),

Luke Grimes hasn't spoken to Kevin Costner since his surprising exit from Yellowstone. “I haven’t talked to him since," Grimes, 40, revealed during a Men’s Health MH Flex interview, which was published on Tuesday,

With the end of Yellowstone, so is Kevin Costner's contact with his on-screen son — at least, according to Luke Grimes. Grimes, who portrayed John Dutton (Costner)'s youngest son, Kayce, on the gritty western drama,