Luke Grimes has heard the criticism that Kayce isn't a Dutton who deserved his own Yellowstone spinoff, Marshals. "I'm my own worst critic," Grimes, 42, told Entertainment Weekly on Wednesday, February 25. "I was like, 'If you take a poll of who people want to have a spinoff, I don't know if Kayce would be top of that list. I think there's other characters that they would rather see.'" Grimes used that as motivation, adding, "So there was a fire under me. Like, it has to be good. If it's not good, I'd rather not do it.