Actress Kim Sun Young from 'Reply 1988' revealed that she knows nothing about the entertainment world.

The actress shared, "I didn't know Hyeri before 'Reply 1988,' so I just thought that she was a very good rookie actor. So I told her, 'You'll be famous soon,' and she replied jokingly, 'I'm already famous.'"

SEE ALSO: Hyeri wows fans with youthful look as high school student at 30 in upcoming drama 'Friendly Rivalry'

She also said, "I once noticed Yoo Yun Suk paying a lot of tax, so I asked, 'Why do you have so much tax? Are you a star or something?' And it turned out, he really was. Once time I asked Nam Sang Mi -- who debuted 13 years ago -- 'Is your dream to become an actor?'" 

Kim Sun Young stated that nowadays, she looks up entertainment news to avoid making awkward mistakes. She said, "I know who Kim Kook Jin is dating, and I also watched Kyuhyun's new MV."