Luke Grimes is reprising his role as Kayce Dutton on the upcoming Yellowstone spinoff Y:Marshals, but not much else is known about the series. It will air on CBS in 2026, but fans have been waiting on details of the cast. Will any of Kayce's family members, namely wife Monica (Kelsey Asbille) and son Tate (Brecken Merrill) be joining the new show?

CBS is expanding the Yellowstone universe with a new series, Y: Marshals. The upcoming drama will follow Kayce Dutton, played by Luke Grimes, as he moves on from his family’s legacy and ranch.

Here’s everything there is to know about Y: Marshals so far.