Former B1A4 leader Jinyoung is leaving fans swooning over his physical transformation in the drama 'Who Is She.'

The scene in the drama all the netizens are talking about shows Jinyoung working out shirtless, his muscles glistening under the light as he works up a sweat. One fan shared photos and clips of the scene saying, "The way he’s sweating is too intense. His face is still as soft as a fawn, but his body is pumped up like crazy."

Jinyoung's unexpectedly sculpted figure has fans head over heels as many fans are stunned by the dramatic change in his image. Many B1A4 fans are impressed how Jinyoung had changed from his soft boy-next-door image during his B1A4 days to a "homme fatal" heartthrob.

They commented:

"Oh my."

"What drama is this? Jinyoung is so stunning."

"This is the Jinyoung I know! When he was younger, he was so thin he was known as Grandpa..."

"I was a BANA too. It's been a while since I heard him being called grandpa. lol."

"Grandpa... It's been a while."

"I was so shocked to see him on 'Who Is She'."

"Oh wow."

"This is legendary."

"What happened to him? He's so hot."

"This is Jinyoung from B1A4 right?"

"Oh my, oh my."

"The grandpa got so hot."

SEE ALSO: Netizens react to Park Sung Hoon shedding tears while apologizing for the "explicit image upload" controversy