CBS is starting to build up the cast of its Yellowstone spinoff Y: Marshals.

Green has been cast on Y: Marshals, the upcoming Yellowstone spinoff starring Luke Grimes, Entertainment Weekly can confirm. The actor, who recently guest starred on And Just Like That, will play Pete Calvin, a friend from Kayce's (Grimes) military service.

Marshall-Green will star opposite Luke Grimes, who reprises his role as Kayce Dutton from “Yellowstone,” in the new series. The show follows Grimes’ Kayce as he joins an elite unit of U.S. Marshals, combining his skills as a cowboy and Navy SEAL to bring justice to his home state of Montana, per the official logline.