CBS is expanding the Yellowstone universe with its latest spinoff, Y: Marshals, following Kayce Dutton (Luke Grimes) as he leaves ranching to join an elite unit of U.S. Marshals in Montana. The show promises a mix of law enforcement action, family drama, and the trademark frontier grit that has defined the franchise.

Who’s Returning?

Several familiar faces from Yellowstone are set to reprise their roles:

• Luke Grimes – As Kayce Dutton, he leads the series, combining his cowboy and Navy SEAL skills in his new marshal duties.

• Cole Hauser – Returning as Rip Wheeler, bringing his loyal presence to the spinoff.

• Gil Birmingham – Back as Thomas Rainwater, maintaining the strong connections to Yellowstone’s central families.

• Brecken Merrill – Reprising Tate Dutton, keeping the Dutton family ties intact.

• Mo Brings Plenty – Appearing as Mo, with scenes expected in the first season.

Additionally, Arielle Kebbel, Ash Santos, Tatanka Means, Brett Cullen, and Logan Marshall Green have been announced as new additions to the cast.

Who Isn’t Coming Back?

Some fan-favorites will not appear in Y: Marshals:

• Kevin Costner – John Dutton is absent unless the series incorporates flashbacks.

• Kelsey Asbille – Monica Dutton’s fate on the show remains unconfirmed; she has not been listed as part of the new cast.

Other Yellowstone Connections

Kelly Reilly (Beth Dutton) is reportedly staying in the Yellowstone universe, but she is expected to lead her own separate spinoff rather than joining Y: Marshals.

What Fans Can Expect

Y: Marshals will continue to explore themes of family, loyalty, and frontier justice, this time through Kayce’s perspective as a marshal. By blending action, moral complexity, and ties to the original series, CBS hopes to maintain the sprawling, cinematic world that Taylor Sheridan has built with Yellowstone and its prequels (1883 and 1923).