The popular SBS entertainment program 'Running Man' member Kim Jong Kook got surprised by actress Ko Ah Sung's age.

On the most recent episode of the popular SBS entertainment program 'Running Man,' which aired on Jan. 17, 2016, the 'Running Man' members played a fairy tale game in the cold, cold ice land. On this day's episode, 'Running Man' members and guests and actors Go Ah Sung and Im Si Wan were divided up into families.

While playing games and talking, Kim Jong Kook looked surprised that guest Ko Ah Sung was 25. Kim Jong Kook said, "Back in the days, people got married at 25."

Fellow 'Running Man' member Yoo Jae Suk jokingly said to Kim Jong Kook, "You are 41 and still not married." Kim Jong Kook, angry, replied, "Go away," and made the people at the scene laugh. In related news, on last weekend's episode, the 'Running Man' members posed as heirs of a giant mansion and played games of hopscotch, where they tried to expand their territory. Actress Im Ji Yeon starred as a guest host, and she was popular throughout the episode by the male Running Man members.

The SBS entertainment program 'Running Man' is one of the most popular Korean TV shows' with international fame. The popular SBS entertainment program 'Running Man' airs every Sunday night. Running Man members star on each weekend's episode, along with the episode's guests.