Dean S. Jagger was born on November 11, 1978, in Dewsbury, West Yorkshire, England. He is a British actor and former extreme sports athlete who transitioned from a professional skating and mixed martial arts background into a successful acting career. Jagger gained international recognition for his portrayal of the fierce Smalljon Umber in the sixth season of the HBO epic Game of Thrones and later starred as the Irish labor leader Dylan Leary in the martial arts drama series Warrior. His filmography includes roles in the action thriller Hunter's Prayer (2017), the Apple TV+ series See, and the 2023 film One Ranger.