Luke Grimes hinted that fans will see a few of his Yellowstone co-stars in his upcoming spin-off Y: Marshals.

Grimes, 41, played Kaycee Dutton in all five seasons of the hit Paramount Network show Yellowstone, which wrapped up its run back in December after an explosive end which saw show veteran Kevin Costner exit the show amid feud rumors.

 

 

Last month, CBS gave the spin-off Y: Marshals a straight-to-series order, debuting sometime in 2026 in midseason.

The show will follow Grimes’ character Kaycee Dutton as he joins an, ‘elite unit of U.S. Marshals, combining his skills as a cowboy and Navy SEAL to bring range justice to Montana, where he and his teammates must balance family, duty and the high psychological cost that comes with serving as the last line of defense in the region’s war on violence.’

Aside from Grimes, no other cast members were confirmed for the new series from Yellowstone creator Taylor Sheridan.

However, while promoting his new A24 film Eddington with TooFab, Grimes confirmed that there will be some Yellowstone stars popping up in the show.

 

 

‘You will see some familiar faces. I’m excited to do it. It’s going to be year eight for me, playing the same character, which is, who would have thought that I would ever play a character for eight years?’ Grimes said.

He added, ‘But, he’s really close to my heart. He feels like a family member, and it would be weird to fully let him go anyway, so I’m glad we get to reconnect.’

It seems likely that Kaycee’s wife Monica Long Dutton (Kelsey Asbille) would have some sort of presence in the show, along with their son Tate (Brecken Merrill).

The Yellowstone finale ended with Kaycee coming up with the plan to save the sprawling Yellowstone-Dutton ranch.

He decided to sell the ranch back to the Broken Rock Indian reservation for the same price per acre that land sold for when his family obtained the land.

Part of the deal carved out a small part of the ranch for Kaycee and his family to live and raise their own cattle on, while his sister Beth (Kelly Reilly) and her husband Rip (Cole Hauser) bought their own ranch nearby as well.

Rip and Beth are two other possible candidates to return on Y: Marshals, given their proximity to Kaycee and Monica that was established in the Yellowstone finale.

Many of the ranchers who worked out of the infamous bunkhouse on the ranch all ultimately went their separate ways, though they could return as well.

Y: Marshals will join the CBS Sunday night lineup sometime next spring in the 9 PM timeslot, along with 60 Minutes at 7 PM, Tracker at 8 PM and Watson at 10 PM.

It’s unclear when production will begin on the series, or when more casting will be announced for the show.

Y: Marshals joins another Yellowstone spin-off entitled The Madison, following a wealthy New York City family who relocates to a ranch in Montana.

Michelle Pfeiffer stars alongside Kurt Russell, Patrick J. Adams, Beau Garrett, Elle Chapman and Amiah Miller.

Luke became a household name on the smash hit series playing Kayce Dutton, the son of Kevin Costner’s rancher patriarch John Dutton.

Kevin sensationally left the show before its final half-season, amid explosive reports that he clashed with its creator Taylor Sheridan.

In the wake of his departure, Luke rhapsodized about how the last episodes were ‘the easiest’ to film because ‘some of the conflict was gone,’ kicking up a flurry of rumors that he had also feuded with Kevin, though he denied ‘any hard feelings.’

Kevin left the show after filming only the first half of season five, prompting his character John to be killed off in a murder-for-hire plot.

His departure came under a cloud of rumors that he feuded with Taylor Sheridan, though he evidently ultimately left the show over scheduling conflicts with his own four-part Western movie Horizon, which he directed, starred in and co-wrote.

Horizon, a decades-long passion project Kevin poured over $38 million of his own money into, debuted its first part last year to dismal box office results.

Meanwhile Yellowstone aired the last half of season five in 2024, dividing fans – and shortly thereafter, Luke gave a telling interview about Kevin’s exit.

‘Hopefully everyone can see that it was time,’ Luke said of John Dutton being killed off, in an interview with Men’s Health. ‘To be really honest, there was a part of Kevin being gone that meant some of the conflict was gone.’

He shared: ‘Obviously, it didn’t make it super fun to be around… Not pointing any fingers, but it was actually the easiest season we’ve filmed.’

Luke revealed he had not spoken to Kevin since the Oscar-winner left the show, explaining with a laugh: ‘It’s not a case of any hard feelings or anything; its just, he’s Kevin Costner. He’s a big deal.’

He clarified: ‘I do have his phone number – I just don’t feel like it’s my place to reach out. He can reach out to me if he wants.’