The strongest man in Westeros is also one of the strongest men on earth.

Iceland’s Hafþór “Thor” Júlíus Björnsson made his debut on Game of Thrones Sunday night, portraying Gregoe Clegane, aka The Mountain, the man set to fight for Cersei Lannister in Tyrion’s trial by combat. Though the character has appeared in other seasons, Björnsson was recast as the Mountain last summer thanks to his size, strength and quickness.

When he’s not fighting shirtless in King’s Landing, Björnsson is a strongman, competing in the World’s Strongest Man events that used to be a staple of daytime ESPN2. In 2014, Björnssonj was 0.44 seconds away from winning the overall competition and settled for second place. He finished third place in 2012 and 2013.

He once set a world record by throwing a washing machine 15.4 feet.

And another for bending cast iron bars.

His keg tossing skills are also quite impressive.

Though Sunday night’s GoT director used some standard camera tricks to make Björnsson bigger than he appears. He stands 6-foot-9, weighs over 400 pounds and consumes 10,000 calories per day while training.