Hafþór Júlíus Björnsson

Hafþór Júlíus Björnsson is an Icelandic strongman and actor. He is best known for playing Ser Gregor "the Mountain" Clegane on HBO's Game of Thrones for five seasons, but his real dominance is in the world of strength sports. With 32 international titles, 60 overall wins, and 130 world records, Björnsson has achieved more than any other strongman in history. He is the only athlete to sweep the World's Strongest Man, Europe's Strongest Man, and Arnold Strongman Classic in a single year, 2018. Fans and analysts often call him the strongest man to have ever lived.

Standing 6 feet 9 inches and weighing over 400 pounds at his peak, Björnsson is a physical marvel. He holds the all-time deadlift world record at 510 kilograms (1,124 pounds), a feat that earned him the nickname "king of the deadlift." His combination of raw power, charisma, and crossover appeal has made him a global icon, known simply as "Thor" or "the Mountain." In 2023, he was inducted into the International Sports Hall of Fame. Björnsson continues to compete and train, with plans to break his own deadlift record. He also appeared in the 2022 film The Northman. He is 37 years old as of 2026, born on November 26, 1988, in Reykjavík, Iceland. He is of Icelandic ethnicity and generally believed to follow Christianity. [edit]

Björnsson grew up in Reykjavík and later moved to Kópavogur at age eleven. As a kid, he was full of energy and struggled to sit still in class. He played soccer, did gymnastics, and discovered a love for basketball in eighth grade. He attended Grundaskóli and Hjallaskóli, then the polytechnic school FB Breiðholt. Summers on his grandfather's farm involved lifting large natural stones, an early hint of his future strength. He also loved playing video games.

He played professional basketball for FSU Selfoss, but a knee injury at age twenty ended that path. Multiple broken feet from overtraining—being on the court three times a day—forced him to switch gears. He turned to strength training and broke Icelandic records in his very first strongman competition. In 2011, he got a wild card to the World's Strongest Man and finished sixth. Before his big break, he also worked as a security guard at a local bank in summer 2013. [edit]

Björnsson's strongman career took off in 2010 when he won his first Iceland's Strongest Man title. He quickly became a regular at the top of the sport, finishing in the top three at World's Strongest Man from 2012 to 2017. In August 2013, he was cast as Ser Gregor Clegane on Game of Thrones, becoming the third actor to play the role and the first to appear in more than one season. He played the Mountain from Season 4 through the finale.

2014 brought his first Europe's Strongest Man win, a title he would claim five times (2014, 2015, 2017, 2018, 2019). In January 2015, he broke a 1,000-year-old Viking record by carrying a 1,433-pound log for five steps at the World's Strongest Viking competition. The peak came in 2018: he won the World's Strongest Man, the Arnold Strongman Classic, and Europe's Strongest Man, the only person to sweep all three in one year. He also set a deadlift world record of 1,041 pounds at the Arnold that year. In 2020, he broke his own record with a 501 kg (1,104.5 lb) deadlift. After a brief retirement, he returned to competition in 2024. He has won 12 Iceland's Strongest Man titles, 10 Giants Live wins, 9 Strongman Champions League victories, 3 Arnold Strongman Classic titles, and 2 World's Strongest Viking titles. [edit]

Björnsson is known for his massive physique and intense, scowling expression on stage, which contrasts with his gentle, family-oriented persona off camera. He often wears Rogue Fitness apparel and shares training content, family moments, and competition updates on social media. Fans affectionately refer to him as "the Mountain" or "Thor," blending his Game of Thrones role with his Norse heritage. The media portrays him as a fearsome competitor but a humble, approachable person in real life. His combination of strength and crossover appeal has made him a beloved figure in both the strongman community and pop culture. He is also known as "king of the stones" and has been called "the strongest man to have ever lived." [edit]

Hafþór Júlíus Björnsson commands a fanbase as colossal as his frame, but it's a legion without a formal name. There's no "Thor Army" or "Mountain Men" in the official lexicon; instead, fans rally around his nicknames, "Thor," "The Mountain," "The Mountain That Rides", labels that blur the line between the actor and the legendary figure he portrays. With roughly 5 million Instagram followers and over a million YouTube subscribers, his audience is vast yet loosely organized, engaging primarily through his own content: raw training footage, family moments, and record-breaking attempts. He's known to interact directly, from a 2014 Reddit AMA to viral videos like "She Climbed The Mountain," which drew tens of thousands of reactions. While there are no documented fan campaigns or coordinated projects, his followers celebrate his feats with fervor, turning each lift into a global spectacle.

His fame, though, is a measured force. iFANN's Global Fame Engine has evaluated him, but as of August 2026, he holds no placement in the published rankings, neither the Global Top 1,000 nor any Top-100 scope list. That may seem surprising for a man who has deadlifted 501 kilograms, but fame is a fickle metric, and his dominance in strength sports doesn't always translate to the broader cultural indexes. Still, his reach is undeniable: from Game of Thrones to viral moments with Arnold Schwarzenegger, he remains a figure of global recognition, even if the rankings haven't caught up.[edit]

Björnsson is one of three actors to play Gregor Clegane on Game of Thrones, but he's the only one to appear in more than one season. He once broke a 1,000-year-old Viking record by carrying a 1,433-pound log five steps, a feat that stood since the late 900s. He plays chess with a Blitz rating of 800, and once endured a traumatic flight seated between two talkative elderly women who refused to trade seats. He's also the reigning world deadlift champion and Eisenhart deadlift champion.

His most iconic moment came on May 2, 2020, when he deadlifted 501 kilograms (1,104 pounds) in his gym in Iceland, breaking Eddie Hall's record and setting a mark that fans still cite as his crowning achievement. In 2025, he upped the ante with a 510-kilogram lift at the Strongman Open, though the official record status was debated. He also made headlines in 2026 by joining the controversial Enhanced Games, where he attempted but failed to beat his own record, a saga that sparked fierce debate among fans. And who can forget the viral photo of him standing next to Arnold Schwarzenegger, a size comparison that became instant internet lore?[edit]

Björnsson's father, Björn Jónsson, was a basketball player who stands 203 cm tall. His mother is Ragnheiður Margret Juliusdottir. He has two sisters, Hafdís Lind Björnsdóttir and Bryndís Björg Björnsdóttir. He lives in Kópavogur, Iceland, with his wife Kelsey Henson and their children. He has a daughter, Theresa Líf, from a previous relationship, and a son, Stormur Magni, born in September 2020 with Kelsey. The couple announced they were expecting their second child together in October 2023. As of 2026, they have two children. [edit]

Björnsson is closely associated with Game of Thrones co-star Lena Headey and author George R.R. Martin. He is one of three actors to play Gregor Clegane, alongside Conan Stevens and Ian Whyte. His wife, Kelsey Henson, is an Instagram star who often appears in his social media content. [edit]

Björnsson has had two public relationships. He had a previous relationship with an unnamed partner, with whom he has a daughter, Theresa Líf. No other details about this relationship are public. In 2018, he married Kelsey Henson, an Instagram star, on August 24. Their first child together, a son named Stormur Magni, was born on September 26, 2020. In October 2023, they announced they were expecting their second child. As of 2026, Björnsson is married to Kelsey Henson and they have two children. [edit]

iFANN currently estimates Hafþór Júlíus Björnsson's net worth at $12 million. His wealth stems from a diverse portfolio. His acting role as the Mountain on Game of Thrones provided a significant financial boost, enabling him to fly business class and elevating his global profile. Strongman prize money adds to the coffers, with the Arnold Strongman Classic first prize at $70,000. Endorsement deals, particularly with Rogue Fitness, contribute substantially, alongside earnings from appearances, merchandise, and his substantial social media following. Since his rise to fame, his net worth has grown steadily, reflecting his dominance in strength sports and his crossover appeal as a pop culture icon.[edit]

Björnsson has won the World's Strongest Man (2018), the Arnold Strongman Classic three times (2018, 2019, 2020), Europe's Strongest Man five times, and the World's Ultimate Strongman (2018). He holds 12 Iceland's Strongest Man titles, 10 Giants Live wins, and 9 Strongman Champions League victories. He also won the World's Strongest Viking twice. [edit]