Some k-drama actors don't just express their talent in films or dramas. They also share what they are passionate about by writing books.

Here are five Korean actors who are also authors, including a few bestselling ones.

1. Gu Hye Sun may be the most prolific writer but then she's multi-talented, with directorial efforts and art exhibits to her credit. Her first book, "Tango," was a semi-autobiographical novel about a young woman's experience. It sold 30,000 copies in a week.

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