Hafþór Júlíus Björnsson, known worldwide as “The Mountain,” is an Icelandic strongman, actor, and former professional boxer. Born on November 26, 1988, in Reykjavík, Iceland, he rose from a basketball background to dominate the world of strength sports and later crossed over into mainstream entertainment through his role on HBO’s Game of Thrones and a headline-grabbing boxing match.
Björnsson is widely considered one of the strongest athletes in history, holding the all-time deadlift world record of 510 kg (1,124 lb) and the official Guinness World Record for the heaviest conventional bar deadlift at 501 kg (1,105 lb). His combination of sheer size, technical ability, and competitive longevity has made him a defining figure in strongman.
Beyond his athletic feats, Björnsson’s personal life has also drawn significant public attention, including his marriage to Kelsey Henson, his children, and serious allegations of domestic violence that he has faced over the years.
What Are Hafthor Bjornsson’s Physical Stats?
Hafþór Júlíus Björnsson
2.06 m (6 ft 9 in)
205 kg (452 lb)
501 kg (2020)
- Hafthor Bjornsson holds the official world record for the heaviest deadlift (501 kg / 1105 lb) achieved in 2020.
- He gained global fame for playing Ser Gregor “The Mountain” Clegane in HBO’s Game of Thrones.
- He won the World’s Strongest Man competition in 2018 and has multiple Giants Live titles.
- In 2021 he transitioned to professional boxing, facing Eddie Hall in a heavyweight bout.
- He is married to Kelsey Henson, and they have two children together.
| Category | Value | Notes |
|---|---|---|
| Full Name | Hafþór Júlíus Björnsson | Icelandic pronunciation |
| Born | November 26, 1988 | Reykjavík, Iceland |
| Height | 2.06 m (6 ft 9 in) | Verified by strongman competitions |
| Weight (Competition) | 205 kg (452 lb) | Giants Live data |
| Weight (Boxing) | 152 kg (335 lb) | Reduced for Eddie Hall match |
| Deadlift World Record | 501 kg / 1105 lb | Guinness World Record, 2020 |
| All-Time Deadlift | 510 kg / 1124 lb | Eisenhart Deadlift Championships |
| Spouse | Kelsey Henson | Married 2018 |
| Children | Two | With Kelsey Henson |
| Nickname | “The Mountain” | From Game of Thrones role |
What Are Hafthor Bjornsson’s Greatest Athletic Achievements?
Deadlift Dominance
Björnsson is widely regarded by experts as “the strongest man to have ever lived.” His all-time deadlift record of 510 kg (1,124 lb) was set at the Eisenhart Deadlift Championships, while his official Guinness World Record stands at 501 kg (1,105 lb) on a conventional bar in 2020. He is also known for his 17.54-second Atlas Stone record for five stones at Europe’s Strongest Man in 2017, and for carrying a 650 kg (1,430 lb) log five steps at the World’s Strongest Viking in 2015, breaking a 1,000-year-old record.
Björnsson’s 510 kg deadlift is the heaviest ever achieved in competition, surpassing the previous mark by a significant margin. His 501 kg lift is officially recognized by Guinness World Records as the heaviest conventional bar deadlift.
Strongman Titles
Björnsson is Giants Live’s most prolific winner, having topped the podium nine times. He won the World’s Strongest Man title in 2018 and made the podium eight consecutive times between 2012 and 2019. He also won Europe’s Strongest Man five times (2014, 2015, 2017, 2018, 2019) and the Arnold Strongman Classic three times (2018, 2019, 2020). Domestically, he has won 16 Icelandic titles and was Iceland’s Strongest Man six years in a row.
Boxing Career
On February 13, 2021, Björnsson competed in a professional boxing match against fellow strongman Eddie Hall, winning by decision. He fought in the Titanweight class and weighed in at 152 kg (335 lb) for the bout, significantly lighter than his competition weight. He later retired from boxing due to health concerns.
Who Is Hafthor Bjornsson’s Family and What Is His Background?
Early Life and Path to Strongman
Björnsson was a former professional basketball player who made Iceland’s junior national team but quit at age 20 due to injuries. While working as a bank security guard, he was spotted at a gym by Magnus Ver Magnússon, a legendary strongman, who encouraged him to train. One year later, he became Iceland’s Strongest Man. He received his first wildcard into the World’s Strongest Man in 2011, finishing sixth.
Wife and Children
Björnsson married Kelsey Henson in August 2018. The couple has two children together. He also has a child with a previous partner, Thelma Björk Steinman. His brother, Birkir Björnsson, is also a strongman competitor.
Domestic Violence Allegations
Björnsson has faced serious allegations of domestic violence and physical abuse. Thelma Björk Steinman stated in an interview that he subjected her to “years of physical abuse.” Additionally, ex-fiancée Andrea filed charges citing numerous incidents of domestic violence. Reports indicate he has “managed to evade arrest multiple times” despite these allegations. These claims remain unproven in a court of law but have been persistent in public reports.
How Did Hafthor Bjornsson’s Acting and Boxing Careers Develop?
Game of Thrones Role
Björnsson portrayed Gregor “The Mountain” Clegane in Seasons 4 and 5 of HBO’s Game of Thrones. He was the third actor to play the role, succeeding Conan Stevens and Ian Whyte, and was the first to portray the character in more than one season. The nickname “The Mountain” aligns with both his character and his real-life nickname due to his imposing stature.
His role on Game of Thrones introduced Björnsson to a massive global audience, helping to raise the profile of strongman as a sport. The character’s nickname became synonymous with his own public identity.
Boxing Crossover
The 2021 boxing match against Eddie Hall was one of the most hyped crossover events in combat sports, drawing millions of PPV buys. Björnsson trained extensively for the bout, dropping to 152 kg (335 lb) to meet the Titanweight class requirements. He retired from boxing soon after, citing health concerns.
Björnsson’s significant weight reduction for the boxing match—from a competition weight of around 205 kg down to 152 kg—was a dramatic shift that he later stated posed health risks, contributing to his decision to retire from the sport.
What Is the Career Timeline of Hafthor Bjornsson?
- 2009 – Began strongman career after being discovered by Magnus Ver Magnússon.
- 2011 – First appearance in World’s Strongest Man, finishing sixth.
- 2014 – Won Europe’s Strongest Man for the first time.
- 2015 – Set an official deadlift record of 465 kg; broke a 1,000-year-old Viking log-carry record.
- 2016 – Won the Arnold Strongman Classic for the first time.
- 2018 – Won the World’s Strongest Man title; married Kelsey Henson.
- 2020 – Set the official deadlift world record of 501 kg (Guinness-recognized).
- 2021 – Boxing debut vs. Eddie Hall, winning by decision.
- 2023 – Transitioned to professional strongman coaching and content creation.
What Is Confirmed and What Remains Uncertain About Hafthor Bjornsson?
| Established Information | Information That Remains Unclear |
|---|---|
| Deadlift record of 501 kg on May 2, 2020, witnessed and widely accepted, though not ratified by all federations. | As of 2025, Björnsson has had only one professional boxing fight (against Eddie Hall) and may face other opponents; updates are expected. |
| Married to Kelsey Henson in 2018; two children together. | He has expressed interest in further boxing matches and breaking his own deadlift record, but no confirmed dates have been set. |
| Confirmed role as Gregor “The Mountain” Clegane in Game of Thrones (2014–2019). |
What Is Hafthor Bjornsson’s Impact on Strongman and Popular Culture?
Björnsson’s 501 kg deadlift record pushed the boundaries of human strength and brought international attention to strongman as a sport. His role on Game of Thrones introduced him to a massive new audience, helping the sport gain visibility beyond its traditional fan base. The boxing match against Eddie Hall in 2021 was one of the most hyped crossover events, drawing millions of PPV buys and further cementing his status as a mainstream figure. He continues to be a leading figure in strength sports through training content and public appearances, and his training app ‘Strength System’ has gained a following among aspiring strongmen.
What Are the Key Sources and Quotes About Hafthor Bjornsson?
“I’m not just The Mountain; I’m a person who wants to inspire others to push their limits.”
– Instagram post, 2020
“The 501 kg deadlift was the hardest thing I’ve ever done, but I knew I had it in me.”
– Interview, Joe Rogan Experience #1680
“Hafthor is a once-in-a-generation athlete who combined size with incredible technique.”
– World’s Strongest Man commentator, 2018
What Is Next for Hafthor Bjornsson?
Björnsson has discussed a potential rematch with Eddie Hall in boxing and has teased a possible attempt to break his own deadlift record, with 510 kg mentioned on social media. He continues to grow his training app ‘Strength System’ and remains active in content creation. For more on his Game of Thrones co-stars, see Maisie Williams – Complete Biography and Career Guide 2026. You can also explore the story of another modern icon in PewDiePie – Complete Biography and Career Timeline 2026.
Frequently Asked Questions About Hafthor Bjornsson
How old is Hafthor Bjornsson?
He was born on November 26, 1988, making him 36 years old as of 2025.
What is Hafthor Bjornsson’s net worth?
Estimates vary, but his net worth is believed to be around $3–5 million, from strongman, acting, endorsements, and boxing.
Has Hafthor Bjornsson won World’s Strongest Man?
Yes, he won the World’s Strongest Man title in 2018.
Does Hafthor Bjornsson have any brothers?
Hafthor has a brother named Birkir Björnsson, who is also a strongman competitor.
What is Hafthor Bjornsson’s diet and training like?
He follows a high-calorie diet (around 10,000 calories per day) and trains heavily with compound lifts and strongman events.
What is Hafthor Bjornsson’s height in feet?
He stands 6 ft 9 in (2.06 m) tall.
What is Hafthor Bjornsson’s boxing record?
He fought once professionally, defeating Eddie Hall by decision in February 2021.
Who is Hafthor Bjornsson’s wife?
He is married to Kelsey Henson. They wed in August 2018 and have two children together.
What is Hafthor Bjornsson’s max bench press?
While not officially recorded in competition, he has been reported to bench press over 250 kg (551 lb) in training.
Why is Hafthor Bjornsson called “The Mountain”?
The nickname comes from his role as Gregor “The Mountain” Clegane on HBO’s Game of Thrones, and also reflects his imposing physique.
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Grace Hollis is Film & Music Editor at StoryNative.uk, covering film releases, music news, soundtracks and awards season.