Cast of Secret Door

Main cast

Lee Je-hoon
Lee Je-hoonas Crown Prince Sado
Kim You-jung
Kim You-jungas Seo Ji-dam
Yoon So-hee
Yoon So-heeas Seo Ji-dam / Park Bingae
Han Suk-kyu
Han Suk-kyuas King Yeongjo
Park Eun-bin
Park Eun-binas Lady Hyegyeong
Kim Min-jong
Kim Min-jongas Na Chul-joo
Lee Won-jong
Lee Won-jongas Park Mun-su
Kwon Hae-hyo
Kwon Hae-hyoas Seo Kyoon
Jeon Kuk-hwan
Jeon Kuk-hwanas Lee Jong-sung
Jang Hyun-sung
Jang Hyun-sungas Hong Gye-hui
Uhm Hyo-seop
Uhm Hyo-seopas Min Baek-sang
Kim Ha-kyoon
Kim Ha-kyoonas Kim Sang-ro
Choi Won-young
Choi Won-youngas Chae Je-gong
Seo Jun-young
Seo Jun-youngas Shin Heung-bok
Ha Seung-lee
Ha Seung-leeas Queen Jeongsun
Park Hyo-ju
Park Hyo-juas Woon-shim
Kim Tae-hun
Kim Tae-hunas Kang Pil-jae
Jeong Gyu-su
Jeong Gyu-suas Yang Soon-Man
Kwak Hee-sung
Kwak Hee-sungas Kim Moo
Jo Woo-jin
Jo Woo-jinas Lee Dal-seong
Kim Woo-seok
Kim Woo-seokas Lee Seon [Young] / Lee San [Young]
Lee Won-jae
Lee Won-jaeas Kang Seo-won
Kim Hyun
Kim Hyunas Jang Hwa Won
Kim Chang-wan
Kim Chang-wanas Kim Taek
Son Byung-ho
Son Byung-hoas Kim Sung Ik
Yoon Seo-hyun
Yoon Seo-hyunas Cheon Seung Se
Park So-eun
Park So-eunas Shin Go-eun