Hafþór Júlíus Björnsson, known for playing The Mountain on Game of Thrones and for his status as the world's strongest man, has undergone a massive physical transformation.

　　Björnsson is currently training for a boxing match, and with the event coming up very soon on September 18, he is now in top shape for the showdown.

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　　Björnsson showed off his dramatic physical transformation on Instagram recently, posting a series of before-and-after photos. As you can see, he is now incredibly cut.

　　Björnsson takes on Devon Larratt in Dubai on September 18 in what should be a compelling boxing match. He said on Instagram, "Saturday the 18th I'm fighting and I cannot wait to show you my improvements. [Devon Larratt] be ready for war!!"

　　The Björnsson vs. Larratt bout is the main event at the fight on Saturday. The fight is scheduled to run for six three-minute rounds, or until someone gets knocked out. The fighters will wear 12oz gloves and no headgear. The PPV costs $10 USD.

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