sixth brother Joo Young-min as child Grand Prince Seongnyeong Joo Da-young as Princess Jeongso; Sejong's first daughter Kim Ji-won as child Princess Jeongso Lee Joo-hyun as Princess Jeongui; Sejong's second daughter Yeo Min-joo as Crown Princess Sun of the Haeum Bong clan; Yi Hyang's second wife Han Shi-hoon as Grand Prince Anpyeong; Sejong's third son Kang Han-byul as child Grand Prince Anpyeong Yoon Se-ah as Royal Noble Consort Hyo of the Cheongpung Kim clan; Taejong's concubine Kang Kyung-heon as Cho Gung-jang; Jeongjong's concubine Jo Sun-ok as Royal Noble Consort Ui of the Andong Kwon clan; Taejong's concubine Noh Young-guk as King Jeongjong; Sejong's second uncle Jung Doo-hong as King Taejo; Sejong's grandfather New supporters Kim Kap-soo as Chief State Councillor Hwang Hui Ahn Dae-yong as Maeng Sa-sung Lee Won-jong as Yun Hoe Jo Sung-ha as Yi Su Sun Dong-hyuk as Choe Yun-deok Lee Jin-woo as Jeong In-ji Lee Sung-min as Choe Man-ri Kim Young-ki as Byeon Gye-ryang Lee Byung-wook as Kim Jong-seo Lee Dal-hyung as Shin Jang Kwon Yul as Shin Suk-ju Oh Yong as Jung Chang-son Yoon Ki-won as Uhm Ja-chi Old supporters Kim Ki-hyun as Yu Jung-hyun Jung Dong-hwan as Jo Mal-saeng Kim Ha-kyun as Heo Jo Kim Jung-hak as Kim Mun Others Lee Chun-hee as Jang Yeong-sil Jun Hyun as Yi Cheon Lee Dae-yeon as Choe Hae-san Choi Jong-won as Ha Ryun Park Young-ji as Park Eun Choi Sang-hoon as Shim On; Sejong's father-in-law Jung Heung-chae as Kang Sang-in Choi Joo-bong as Kim Han-ro Kim Eung-soo as Min Mu-gu, Sejong's first maternal uncle Lee Kyung-young as Min Mu-jil, Sejong's second maternal uncle Kim Hyung-il as Min Mu-hyul, Sejong's third maternal uncle Lee Woo-suk as Min Mu-hoe, Sejong's fourth maternal uncle Kim Joo-young as Yi Suk-beon Park Sang-jo as Yi Jong-mu Jang Ki-yong as Yi Soon-mong Lee Won-bal as Park Sil Hwang Bum-shik as Noh Hee-bong People in Ming Oh Seung-yoon as the Emperor Jeongtong Kim Jin-sung as child Jeongtong Go In-bum as Eunuch Hwang Eom Lee Dae-ro as Eunuch Wang Jin Kim Hak-chul as Huang Chan Jeong Yu-mi as Da-yeon Ha Yong-jin as Hae Su, Huang Chen's commander Shim Woo-chang as Yeo-jin People in Goryeo Kim Yong-soo as Wang Ahn Kim Myung-kon as Ok Hwan Kim Seung-wook as Jeon Haeng-su Jung Ui-gap as Mu-bi Moon Chun-shik as Jeon Il-ji Choi Sang-kil as Jang Chil-sang Park Yong-soo as Han Young-ro People in Japan Bae Sung-woo as Pyung Do-jun