Luke Grimes Blindsides Fans With Big Update on Yellowstone Spinoff

Kayce Dutton (Luke Grimes) is trying to keep his skeletons in the closet in the latest Y: Marshals teaser. The teaser was posted on CBS‘s Instagram and gives a new, albeit very brief, look at Grimes and his costars in the upcoming Yellowstone spinoff, premiering in 2026.

“I’m just grappling with some skeletons I’d like to keep in my closet,” Kayce says in the short clip. The footage shows an armed Grimes walking through Montana woods with his fellow marshals, played by Arielle Kebbel and Ash Santos.

In a previous teaser from October 20, Kayce says, “I’m changing paths. I’m trying to find a new beginning.” He was still wearing his wedding ring in that video, implying that he and Monica Dutton (Kelsey Asbille) are still together despite Asbille’s absence from the Y: Marshals cast list. Brecken Merrill is reprising his role as Tate Dutton, Kayce and Monica’s son, in the new series. See the new Y: Marshals teaser below.

In addition to Grimes, Y: Marshals is bringing three Yellowstone stars into the fold for the CBS spinoff. There’s Merrill as Tate, and Gil Birmingham and Mo Brings Plenty will be back as Thomas Rainwater and Mo, respectively.

Y: Marshals will see Grimes reprise his role as Kayce Dutton in the series that will be a procedural following his life as a U.S. Marshal in Montana. This is a new job for Kayce, one that harkens back to his military roots and Livestock Association commissioner role as seen in Yellowstone. Additional stars are Logan Marshall-Green, and Tatanka Means. A Beth and Rip Yellowstone spinoff is also in the works with Kelly Reilly, Cole Hauser, and Finn Little set to reprise their roles as Beth Dutton, Rip Wheeler, and Carter, with Annette Bening as a new character named Beulah Jackson.

Is Kelsey Asbille returning as Monica Dutton in Y: Marshals?

Paramount Network

With Grimes reprising his role, and with the show set in Montana like the original series, it’d be safe to assume that Kayce’s family would be part of the story. Grimes previously told People that there will be some “familiar faces” in the cast, as well as new ones. But Asbille’s absence from the August 26 casting announcement raises questions about Monica’s presence in the spinoff. Of course, it’s still possible she could appear, but fans will have to wait and see if her casting is announced. Yellowstone ended with Kayce selling the Dutton ranch to Tom Rainwater, giving the land back to the indigenous people of the Broken Rock Reservation community of which Monica and Tate are descendants. Kayce and Monica were still married by Yellowstone‘s end.

When does the Kayce Dutton Yellowstone spinoff, Y: Marshals, come out?

There’s not an exact premiere date for Y: Marshals yet, but it is confirmed to be a midseason premiere for the 2025-2026 season. It will air on Sundays at 9/8c starting in spring 2026 on CBS. The Sunday spring primetime lineup on the network will be the following:

• 7:00 p.m.: 60 Minutes
  8:00 p.m.: Tracker
  9:00 p.m. Y: Marshals
  10:00 p.m.: Watson