Peter Claffey

Peter Claffey is an Irish actor whose career combines professional rugby with screen and stage work. He attracted international attention in 2024 when he joined the cast of HBO’s House of the Dragon, the Game of Thrones prequel based on George R. R. Martin’s Fire & Blood. Claffey plays Hugh Hammer, a blacksmith in King’s Landing who becomes one of the “dragonseeds” during the Targaryen civil war known as the Dance of the Dragons. Hugh Hammer is not a member of the ruling Targaryen family at the beginning of the story. He is a working man whose life changes when the Blacks seek riders for dragons that have been left without established masters. Claffey’s performance presents Hugh as physically imposing and socially grounded, making his rise from the city’s forge to the centre of the war one of the season’s notable transformations. The role also places him alongside other dragonseeds, including Ulf, played by Tom Bennett. Before House of the Dragon, Claffey appeared in several television productions. His credits include the BBC and Netflix series Vikings: Valhalla, the historical drama set generations after the original Vikings series. He also appeared in the Irish black comedy thriller Bad Sisters, created by and starring Sharon Horgan. These projects gave him experience in ensemble dramas with large international audiences, but House of the Dragon marked his most prominent global role. Claffey’s earlier life was connected to rugby. He played the sport at a serious level in Ireland before moving fully into acting, an experience that helps explain the athletic physicality evident in his work. Rather than beginning as an established film star, he developed his career through smaller television parts and performance training. He studied at The Lir Academy, Ireland’s national drama school based in Dublin, where actors train in performance for theatre and screen. His casting as Hugh Hammer is especially significant because the character’s storyline is tied to questions of legitimacy, class and inherited power. House of the Dragon repeatedly contrasts people born into dynasties with those who possess talent, ambition or a hidden connection to the royal bloodline. Hugh’s discovery of a possible Targaryen heritage does not erase his identity as a labourer; instead, it exposes how quickly political forces can claim and manipulate individuals. By taking the role, Claffey became part of one of television’s most expensive fantasy productions and introduced his work to viewers well beyond Ireland. His career remains relatively young, but his path—from rugby pitches and Irish drama training to a major role in Westeros—is unusually distinctive.