Princess Hours ( Hangul : 궁 ; Hanja : 宫 ; RR : Goong ; lit. Palace ) is a 2006 South Korean television series, starring Yoon Eun-hye , Ju Ji-hoon , Kim Jeong-hoon and Song Ji-hyo .  It is based on Korean manhwa Goong by Park So-hee . It aired on MBC from January 11 to March 30, 2006 on Wednesdays and Thursdays at 21:55 for 24 episodes.