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The Mountain from 'Game of Thrones' works out with this tiny Pomeranian

Hafþór Júlíus Björnsson, who plays The Mountain on HBO's "Game of Thrones," probably has a cuter (and smaller) workout partner than you — a tiny 14-week-old Pomeranian. And he's not afraid to show it.

The 27-year-old Icelandic strongman and actor, whose 395 pound 6'9" stature has earned him the nickname "Thor," is perhaps best known for the brute force he inflicts throughout the fantasy world of Westeros — whether it's as Gregor Clegane or the silent "Ser Robert Strong."

Last month, he shared the strict diet regimen he's been following to prepare for the World's Strongest Man 2016 contest, but that's not the only factor helping him reach his goal.

Selfie time 🦁🐻

A photo posted by Asterix 🦁 (@asterix_astrikur) on

Don't let the size of those biceps fool you — the IRL Thor has a soft side. Rather than opting for a larger canine companion (direwolf, anyone?), he instead has a teeny tiny exercise companion, Asterix (who may actually be the size of one of Björnsson's biceps).

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The most cardio I've done in years!!#TimeForPizza #Asterix&Obelix @asterix_astrikur

A video posted by Hafþór Júlíus Björnsson (@thorbjornsson) on

The duo can be seen in some post workout shots on Björnsson's Instagram profile, and it looks like Asterix may be giving him a run for his money, despite his much, much shorter legs.

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We are both exhausted after our morning workout this morning!! God it's hard to keep up with @asterix_astrikur !!!

A photo posted by Hafþór Júlíus Björnsson (@thorbjornsson) on

Fortunately for them, the workout partnership seems to be going just fine, no matter the dramatic size difference. "We are both exhausted after our morning workout this morning!!" wrote Björnsson in one caption. "God it's hard to keep up with@asterix_astrikur !!!"

It's training time! Last training session before I fly out to Brazil tomorrow for Arnold Strongman Classic Brazil - @swoleoclock

A photo posted by Hafþór Júlíus Björnsson (@thorbjornsson) on

He even calls the perfectly coiffed pup his "lion" because Asterix doesn't play around when it's time for the daily gym grind, and for that, Björnsson has much to be grateful for. "The most cardio I've done in years!!#TimeForPizza #Asterix&Obelix," wrote Björnsson in another post, referring to the French comic series for which the Pomeranian is named.

Back home to my Lion! 🦁

A photo posted by Hafþór Júlíus Björnsson (@thorbjornsson) on

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While the adorable ball of fluff may not be stampeding around Westeros every Sunday night, you can keep up with Asterix on his own Instagram account (because he's a star in his own right — no matter how small).

Reading my favorite magazine😃

A photo posted by Asterix 🦁 (@asterix_astrikur) on

Let's all thank Björnsson for proving that friends come in all shapes and sizes.

Follow @asterix_astrikur @asterix_astrikur

A photo posted by Hafþór Júlíus Björnsson (@thorbjornsson) on

#GameOfThronesFan 😎

A photo posted by Asterix 🦁 (@asterix_astrikur) on

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