Tittle : The Moon That Embraces the Sun Also known as : The Sun and The Moon / The Moon Embracing the Sun Genre : Romance, Fantasy, Period Episode : 20 + 2 Special Broadcast network : MBC Cast Main Cast Kim Soo Hyun as Lee Hwon Yeo Jin Goo as Lee Hwon ( young ) Han Gan In as Wol / Heo Yeon Woo Kim Yoo Jung as Wol / Heo Yeon Woo ( young ) Jung Il Woo as Prince Yang Myung Lee Min Hoo (1993) as Prince Yang Myung ( young ) Kim Min Seo as Yoon Bo Kyung Kim So Hyun as Yoon Bo Kyung ( young ) The Palace Kim Young Ae as Queen Jeonghui ( Lee Hwon's grandmother ) Ahn Nae Sang as King Sung Jo as ( Lee Hwon;s father ) Kim Sun Kyung as Queen So Hye ( Lee Hwon's mother ) Nam Bo Ra as Princess Min Hwa ( Lee Hwon's sister ) -Jin Ji Hee as Princess Min Hwa ( young ) Jung Eun Pyo as Hyung Sun Song Jae Rim as Kim Chae Woon ( Woon ) -Lee Won Gun as Kim Chae Woon ( young ) Yoon Hee Suk as Hong Kyu Tae Kim Ye Ryung as Lady Park ( Prince