Singer and actor Kim Hyun Joong showed off his six pack.

The staff of KBS 2TV drama "Inspiring Generation" that will air tomorrow revealed pictures of Kim Hyun Joong revealing his buff body.

In the pictures, Kim Hyun Joong was topless, showing off his six pack and buff arms. This seem to be a complete change from the 'pretty boy' image he used to have.

Kim Hyun Joong said, "I tried really hard to make a 'sculpture-like' body in the beginning but when I thought about it, in the 1930s, they didn't have gym equipment or protein products like we do now. So I just ate meat and vegetables and slowly built it up. So when you see my body in the drama, you might not think it's that great. But I hope you'll just know that I matched it to the time period."

Photo Credit: KBS 2TV