Seo In Guk appeared on KBS 2TV's latest episode of 'Happy Together 3' and talked about his hit drama 'Reply 1997' and why he initially rejected the casting offer.

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He revealed, "I thought it was going to be a secondary role.  However, they gave me the charismatic role of Yoon Yoon Jae so I told them I wouldn't do it at first."

He explained, "I wasn't even a star nor was I good looking, which was all the more why I thought that it would cause trouble for Director Shin Won Ho . . . I told him I wouldn't do it.  I was scared."

It turned out that his fears and worries were unfounded as the drama was a big hit which propelled Seo In Guk into being a star.