Cha Eun Woo has wowed fans with his jaw-dropping bulk-up.

As reported by media outlets, Cha Eun Woo has recently showcased his 'bulk-up,' resulting in a well-toned physique that is noticeably different from his previous build. Headlines and comments online referred to his shoulder as being as "wide as the Pacific Ocean,' praising his visuals even more.

Although the idol-actor has garnered significant attention over the years for his visuals, his latest evidence of hard-core physical training has surfaced in his latest drama 'A Good Day To Be A Dog,' which premiered on October 11. 

The images below are from his scenes in 'My ID is Gangnam Beauty' in 2018, on the left, compared with his scene in 'A Good Day To Be A Dog,' on the right. 

Media outlets also noted comparisons between his general look during his debut days and now, using the respective images below.

Netizens are reacting with a pleasant surprise that Cha Eun Woo, who debuted at the age of 18, is growing even more as a professional actor by developing his physique.

Comments include:

"He looks good even with a bit of long hair"
"Cha Eun Woo was always good about working out consistently. This is the proof of his effort"

"His face looks even smaller now lol"
"His back is like that of a professional sportsman"
"His shoulders are like the Pacific Ocean"
"His back muscles are out of this world"
"I am speechless because he is so cool"
"People like him with that face shouldn't be allowed to work out"
"Please don't work out if you're already that handsome....that's so inhumanly unfair..."
"This is a cop-out omg"
"Someone take out the gym from his schedule"

"It's too much if his body is going to be like that as well...help"
"He feels like a creature from another planet"
"What if he works out even more, y'all"

What are your thoughts?