Luke Grimes looks concerned as Kayce Dutton on Yellowstone.
Image via Paramount
Luke Grimes finally has a co-star in Y: Marshals. The upcoming CBS drama series serves as a sequel spinoff to Taylor Sheridan’s Yellowstone.

Per Deadline, Logan Marshall-Green has been cast to co-lead Y: Marshals as Pete Calvin, a friend from Kayce’s time in the military. The actor is best known for his work in the horror movies Devil (2010) and The Invitation (2015) as well as Leigh Whannell’s Upgrade (2018) and Ridley Scott’s Prometheus (2012). He also played the first Shocker in Spider-Man: Homecoming (2017) and will next appear in Christopher Nolan’s highly anticipated The Odyssey, which is scheduled to hit theaters in July 2026. Marshall-Green also shares a striking resemblance to fellow Spider-Man actor Tom Hardy, with the two often being mistaken for one another by fans.

Ordered to series in May 2025 by CBS, Y: Marshals will see Grimes reprise his Yellowstone role as Kayce Dutton, as he joins an “elite unit of U.S. Marshals.” Per the official logline, the spinoff will see Kayce “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.”

At the time of writing, Grimes remains the only Yellowstone alum confirmed for Y: Marshals, although the actor has teased that fans could expect to see some more “familiar faces” on the spinoff, as well as “a lot of new faces too.” Given that Yellowstone ended with Kayce Dutton still living happily with his wife, Monica, and son, Tate Dutton, it seems extremely likely that Kelsey Asbille and Brecken Merrill will be brought back in their respective roles for the new series.