Getty Images/Paramount Kelly Reilly is already thinking about reuniting with her on-screen brother Luke Grimes. Luke is now starring in the Yellowstone spinoff series Marshals on CBS where he reprises his role as U.S. Marshal Kayce Dutton. Kelly will soon return to play Beth Dutton in her own spinoff series Dutton Ranch, premiering this May. "I'm so proud of Luke, and we love him so much, and I miss him. I wish we had a crossover. Maybe we will in the future," the actress recently told People.