Kevin Costner got the actor who played his son on ‘Yellowstone’ to dye the grey out of his hair – so it wouldn’t made him look like an old father on screen. ‘The Bodyguard’ actor, 69, starred as ranch patriarch John Dutton on the hit Paramount Network series, and Dave Annable, 45, who portrayed his son Lee Dutton in the show, has opened up about Kevin’s grooming order. Telling People about his latest role in season two of the series ‘Lioness’, he said about being allowed to go back to his natural grey hair for the part: “I asked and this one they said, ‘Yes’. “I asked on ‘Yellowstone’, and God…