By Sophia Charlotte 
Peter Claffey is a well-known Irish actor and a former professional rugby player. He achieved worldwide fame when he was cast as the main character Ser Duncan the Tall in the 2026 HBO series A Knight of the Seven Kingdoms. He is famous due to his huge stature and his innate acting ability.
Peter is a rising star in the television and film world. He moved into acting from professional rugby in 2019 because that was what interested him (SEE MORE STORY). Before landing his big role with HBO, he appeared in popular shows like Bad Sisters, Wreck, and the historical drama Vikings: Valhalla.
How Old Is Peter Claffey?
Peter Claffey was born in Portumna, County Galway, Ireland. As of 2026, he is 29 years old. His star sign is Leo.
Peter Claffey Profile Overview
| 🔖 Detail | 📌 Information |
|---|---|
| 👤 Real Name | Peter Claffey |
| 🎭 Occupation | Actor (Former Professional Rugby Player) |
| 🌟 Known For | Ser Duncan (Dunk) in A Knight of the Seven Kingdoms |
| 🎂 Date of Birth | July 28, 1996 |
| ⏳ Age | 29 Years Old (as of 2026) |
| ♌ Zodiac Sign | Leo |
| 📍 Birthplace | Portumna, County Galway, Ireland |
| 🇮🇪 Nationality | Irish |
| 🌍 Ethnicity | Caucasian (Irish) |
| 📏 Height | Approximately 6’5″ (196 cm) |
| ⚖️ Weight | 105 kg (Current Acting Weight) |
| 🏉 Former Weight | 119 kg (During Rugby Career) |
| 👁️ Eye Colour | Blue |
| 💇 Hair Colour | Brown |
| 🎓 Education | Bow Street Academy (Acting) |
| 🎬 Years Active | 2022 – Present |
| 👫 Relationship | In a Relationship (Ally McGinn) |
| 💰 Net Worth | Estimated $1M – $1.5M (Leading HBO’s 2026 Franchise) |
| @peter_claff |
Early Life and Education
Peter is from Ireland, born on July 28, 1996, and grew up in Portumna. He attended Garbally College, and his height and strength made him a formidable rugby player at the college.
After his sporting career, he switched back to his old passion for performance and joined the Bow Street Academy in Dublin. His training in this popular facility assisted him in sharpening the skills required to move into screen acting.
Height and Weight
Peter stands approximately 6 feet 5 inches (196 cm) tall, a height verified by his professional rugby records, and matching his role as the giant knight, Ser Duncan.
His current weight is about 105 kg approx (231 lbs). In an interview, Peter explained he was a lot bigger, around 119 kg, when he played professional rugby. Deciding to shed the excess weight to shape up for acting and appear leaner and fit on camera.
Family Background
Peter has a supportive Irish family in County Galway. He frequently talks about his upbringing and, in interviews, has said that he was known as the jester in his group of friends when he was growing up. Peter says that he remained humble and retained his sense of humor due to his close and supportive family in Portumna.
Before Fame
Before his acting career, Peter was a professional Rugby Union player and played for the Ireland under-20 team before moving on to Connacht Rugby. He left the realm of professional rugby in 2019 to pursue another.
At this time, he struggled with the usual difficulties of finding himself anew and subsequently had his professional stage debut in 2022 in A Whistle in the Dark at the Abbey Theatre.
Career
Peter Claffey’s career changed overnight on Jan. 18, 2026, with the launch of A Knight of the Seven Kingdoms on HBO. Before landing the lead role of Dunk, he had guest-starred on series such as Netflix’s Vikings: Valhalla and Apple TV+’s Bad Sisters.
He also had the opportunity to share screen time with Oscar-winning Cillian Murphy in 2024’s Small Things Like These. Claffey has said he’d like to return to the stage someday, and performing on Broadway is one of his dreams.
Relationship
Peter Claffey is dating makeup artist Ally McGinn currently. In an interview in January 2026, he shared that Ally was present when he found out about his role on Game of Thrones.
He was in such a state of shock that he was lying on the floor, and she helped calm him. Ally also walked the red carpet with him at the world premiere of the show in early 2026.
Net Worth
Peter Claffey’s net worth is estimated at $1 Million to $1.5 Million in 2026. He has earned this money as a lead actor on a popular HBO series and for several of the other big networks.
Key Takeaways
- Smooth Transition: He successfully transitioned from professional rugby to a top role on TV.
- Iconic Casting: He’s the first guy to play Ser Duncan the Tall on screen.
- Irish Talent: Graduate of Dublin’s top acting academy, worked with a starry roster of greats early in his career.
Trust Signal: This biography is based on official HBO 2026 production updates, Irish rugby records, and Peter’s recent press interviews with The Independent and GQ.
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