Enormous Game of Thrones star Hafþór Júlíus Björnsson ties the knot with girlfriend

Game of Thrones actor Thor Bjornsson has gotten married. Photo / Instagram

Game of Thrones star Hafþór Júlíus Björnsson, who plays the formidable Ser Gregor "The Mountain" Clegane, has tied the knot.

At 6'9, the "World's Strongest Man" actor, 29, towers over his new wife, Kelsey Henson, who stands at just 5'2.

Björnsson tied the knot with Henson in his native Iceland over the weekend, and took to Instagram shortly afterwards to share the happy news.

"It is with great pleasure that I now get to call Kelsey Morgan Henson my wife," he wrote alongside a photo of the pair on their wedding day.

"I get to hold this beautiful woman through thick and thin for the rest of our lives! I'm so excited for all of the future adventures we will tackle side by side. #justmarried."

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It is with great pleasure that I now get to call Kelsey Morgan Henson my wife!❤️ . I get to hold this beautiful woman through thick and thin for the rest of our lives! I’m so excited for all of the future adventures we will tackle side by side. @kelc33 🐥🦍 #justmarried

A post shared by Hafþór Júlíus Björnsson (@thorbjornsson) on Oct 20, 2018 at 11:49am PDT

Henson also shared a gushing tribute on Instagram to her new husband.

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Looking forward to pulling this big guy around for the rest of my life. ♥️ . @thorbjornsson I love you now and forever and promise to stand by your side through all that life throws at us. I love you baby! 👰🏼🤵🏼 . . @weddingiceland . #married #justmarried #wife #husband #wifelife #ballandchain #together #forever #partners #soulmate #bestfriend #goals #love #happy #happiness #smiles #beautiful #family #secret #intimatewedding #wedding #photography #weddingphotography #weddingphoto #iceland #lava #fields #viking #canadian

A post shared by Kelsey Henson (@kelc33) on Oct 20, 2018 at 11:49am PDT

Björnsson and Henson are believed to have met last year in a bar in Canada, where Henson was working as a waitress, after she approached him to ask for a picture.

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💃🕺🏻 @kelc33

A post shared by Hafþór Júlíus Björnsson (@thorbjornsson) on Sep 8, 2018 at 12:07am PDT

Björnsson's fame skyrocketed after he first began appearing in Game of Thrones during season four — and he's already hinted that he'll return for the final season.

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When your love gets absolutely mangled by the sun and you can’t stop giggling 🤦🏼‍♀️😂. . @thorbjornsson . #iceland #canada #canadian #woman #fit #fitness #fitfam #fitspo #train #training #partner #flex #gym #lift #weights #girlswholift #strong #build #strength #grow #gains #dedication #motivation #selflove #discipline #progress #laughing #giggles #sunburn #strongman

A post shared by Kelsey Henson (@kelc33) on Aug 31, 2018 at 3:32pm PDT

Earlier this year, Björnsson was asked by a fan on Instagram which was his "favourite GoT scene to be in."

According to winteriscoming.net, the actor replied: "It happens in season 8 … so I can't speak about it."

The eighth and final season will reportedly air sometime in the first half of next year.