Outlander star Peter Mullan lands very different role in Game of Thrones spin-off March 5, 2026 John News 0 HBO has confirmed three major additions to the cast of the Game of Thrones spin-off A Knight of the Seven Kingdoms. Source: https://www.express.co.uk/showbiz/tv-radio/2178471/outlander-peter-mullan-knight-seven-kingdoms-season-2 READ from source