Kim Jong Kook couldn't help but gush over Joo Won's muscular body after the "Carter" star appeared as a guest on his YouTube channel.
Visually, both celebrities have swoon-worthy physiques but the "Running Man" star was impressed by the actor's physique.
Kim Jong Kook Amazed by Joo Won's Defined Shoulders
In Kim Jong Koo's YouTube video, titled "Carter Shoulders Cuts Like a knife... (feat. Joo Won of the movie "Carter")" the singer-host invited Joo Won for a workout session alongside his fitness trainer.
The 34-year-old actor arrived at the gym wearing an oversized black hoodie and was happy to be reunited with Kim Jong Kook.
After being introduced, Joo Won revealed that he was a fan of the "I Can See Your Voice" host and mentioned that he enjoyed watching "Gym Jong Kook."
When asked about how he often goes to the gym, the "Carter" star revealed hitting the gym almost everyday and explained that it became a part of his routine.
Particularly, the actor shared that his favorite workout routines are shoulders and back exercises.
As Joo Won gears up for the workout routine, Kim Jong Kook was amazed by his ripped shoulders saying "he has it." Even the fitness trainer was impressed by Joo Won's muscular body.
Interestingly, as the trainer checks on the actor's posture doing lateral raises, the "Running Man" star continues to gush over Joo Won's "perfect" and defined shoulders.
"The quality of his muscles and whatnot, he has worked out a lot," he said, adding "I'm actually really surprised. I didn't expect him to have such a great workout posture, amazing ability to control his strength, and most importantly, these muscles. He's definitely the kind of person who works out on a regular basis."
Over the comment section, fans praised Kim Jong Kook for inviting Joo Won and sharing his passion.
"I love seeing another good old-fashioned workout video here and it's fun to see the two of them together like this," one wrote.
READ MORE: 'Carter' Director Discusses Joo Won's Naked Scene + Responds to Possibility of Season 2
One even mentioned how the 34-year-old actor didn't give a fret during his workout session with Kim Jong Kook.
"Joo Won is the first one as an actor who has done training with KJK and never complained about a single thing. But then again he's been training for over 9 years. He's definitely a beast."
Joo Won Bulks Up for Netflix's 'Carter'
As soon as Netflix dropped teasers for the action-packed series "Carter" viewers swooned over Joo Won's unrecognizable looks, not to mention his super ripped body.
In a previous interview ahead of the movie's premiere, the actor revealed that he underwent intense training for four months and gained 7 kg to play agent Carter.
With this, he earned high praise from Director Jung Byung Gi noting his dedication to the role.
"Out of all the male actors I've seen, he's the best at action scenes. He was born with beautiful visuals and lines [of the body]."
Joo Won's new movie was released on August 5 and is among the most watched films on Netflix.
According to Flix Patrol, "Carter" remained unbeatable in the second spot, ranking first in 12 countries.
