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Hafþór Júlíus Björnsson

Hafþór Júlíus Björnsson

Hafþór Júlíus Björnsson is an Icelandic professional strongman, actor, and former professional basketball player. He plays Ser Gregor "The Mountain" Clegane in the HBO series Game of Thrones.

Known for

Taming The Beast

Taming The Beast

2026 • Self (archive footage)

Masters of the Universe

Masters of the Universe

2026 • Goat Man

Finally Dawn

Belle

Eddie Hall: The Beast vs. The Mountain

Eddie Hall: The Beast vs. The Mountain

The Northman

2022 • Thórfinnr Tooth-Gnasher

Eddie Hall: The Beast v The Mountain

Eddie Hall: The Beast v The Mountain

2022 • Thor "The Mountain"

Thor vs Eddie

2022 • Himself

Full filmography

Taming The Beast

Taming The Beast

2026 • Self (archive footage)

Masters of the Universe

Masters of the Universe

2026 • Goat Man

Finally Dawn

2024 • Thot

Belle

2023

Eddie Hall: The Beast vs. The Mountain

Eddie Hall: The Beast vs. The Mountain

2022 • Self

The Northman

2022 • Thórfinnr Tooth-Gnasher

Eddie Hall: The Beast v The Mountain

Eddie Hall: The Beast v The Mountain

2022 • Thor "The Mountain"

Thor vs Eddie

2022 • Himself

Pharaoh's War

2019 • Frank

Game of Thrones: The Last Watch

Game of Thrones: The Last Watch

2019 • Self

Strongman: Beyond the Mountain

Strongman: Beyond the Mountain

2019 • Self

Operation Ragnarok

Operation Ragnarok

2018 • Big John - Icelandic Viking Squad

Fullsterkur

2018 • Himself

Kickboxer: Retaliation

Kickboxer: Retaliation

2018 • Mongkut

Born Strong

2017 • Self

NXT TakeOver: Unstoppable

NXT TakeOver: Unstoppable

2015 • Himself - Audience Member (as Hafthor Bjornsson)

Game of Thrones The IMAX Experience

Game of Thrones The IMAX Experience

2015 • Gregor 'The Mountain' Clegane

The Commissioner of Power

The Commissioner of Power

Unknown year • Himself

Hafþór Júlíus Björnsson – Biography, Known For & Filmography