The behemoth - who was cast as 'The Mountain' in Game of Thrones - has been hard at work trimming down ahead of the boxing match, and his transformation is extremely impressive.
Clearly, the training he undertook to become the world's strongest man was very different to the training he is now undertaking, which involves copious amounts of gruelling sparring and endurance work.
In the latest training video uploaded to his YouTube channel, the 33-year-old conceded that he was in pain and fatigued.
He said: "I'm a bit fatigued right now. I've had a lot of sparring days and a lot of hard sessions in the last few weeks.
"I can definitely feel the fatigue in my legs, my hamstrings, my hands.
"I wake up every morning with inflammation in my arms and everywhere, but luckily my knees are quite healthy."
However, while he's evidently feeling the burn during his relentless fight camp, he assured his fans that it was 'absolutely normal'.
He continued: "My body is very healthy guys don't get me wrong, I feel healthy in other aspects of my life. It is absolutely normal to feel sore, beaten up and feel extremely every tired every day which is normal.
"I know my body I know at this stage when it is injured compared to when it is extremely sore."
Presumably he will allow himself time to recover too before he faces off with Hall on 19 March.
The pair were originally due to fight last September but the clash was postponed after Hall detached his bicep in training.
Now, the former friends turned foes are preparing to step in the ring in Dubai in less than three weeks time, where they're scheduled to lock horns for six three-minute rounds.
Both fighters are confident they'll knock out their opponent with rounds to spare, though.
Hall said: "I've been training out of the spotlight and he doesn't have a clue what I can really do.
"I've got a surprise coming for you Thor, and all your fanboys too.
"You can all keep telling yourselves that you're ready, you can all keep pretending, all I'll say is good luck - 'cause you're gonna need it."
You can livestream the fight for free on SEGI TV.