Viewers were surprised by actor Lee Hyun Jin's pre-diet photo after his before-after photo was revealed on 'Strong Heart'.

On the April 24th episode of the talk show, the actor explained the reason behind his dramatic weight loss as well as how he currently kept in shape.

"Up until I was in my 1st year in high school, I weighed 108 kg (238 lbs)." It turned out that the reason behind his dramatic weight loss was due to his former girlfriend as he explained, "After I broke up with my girlfriend, I began to shed a lot of weight."

When questioned how he maintained his figure, he replied, "My two meals a day were always tofu. I used to run 20 laps around a field and lost 60 kg (132 lbs) in six months." The actor then revealed that the first thing he did after losing weight was trash all photos he had taken with his friends.

Upon seeing Lee Hyun Jin's graduation photo, MC Shin Dong Yup caused the studio to burst into laughter as he remarked, "The photo reminds me of the person in the North," referring to North Korea's current leader, Kim Jong Un.

Meanwhile, the April 24th episode featured other guests such as Ivy, Girls' Generation's�Tiffany, Park Kyung Lim, MBLAQ's Lee Joon, Han Ji Woo, Kim Na Young, Seon Woo, Kim Hwan, and more.

Source & Image: TV Report via Nate