Matthew McConaughey's "Yellowstone" spinoff is officially moving forward at Paramount regardless of Kevin Costner's future on the franchise's flagship show. Paramount Media Networks President and CEO Chris McCarthy confirmed in an interview with the Hollywood Reporter the 53-year-old actor is lined up to star in an extension series set within the "Yellowstone" universe. According to McCarthy, McConaughey's upcoming show is going ahead regardless of whether Costner, who is rumored to be considering an exit, remains with the original series.