WATCH: Game of Thrones' Mountain bests 1,000-year old Icelandic

Hafthor Bjornsson, who plays Ser Gregor Clegane or

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Game of Thrones star Hafthor Bjornsson breaks 1000-year-old Icelandic record

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Watch the Mountain From Game of Thrones Break a 1,000-Year-Old Viking Record

The Ultimate Guide to Game of Thrones in Iceland

The Ultimate Guide to Game of Thrones in Iceland

Hafthor Bjornsson Breaks Viking Strength Record

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Game Of Thrones' The Mountain Breaks 1,000 Year Old Viking Record

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Game of Thrones star 'The Mountain' named Europe's Strongest Man for fifth time, The Independent