Secret Door

Han Suk-kyu

King Yeongjo

Lee Jehoon

Lee Seon (Crown Prince Sado)

Yoo-jung Kim

Seo Ji-dam

Park Eun-bin

Lady Hye-gyeong

Choi Wonyoung

Chae Je-gong

Jeon Gook-hwan

Lee Jong-Sung

Eom Hyo-Seob

Min Baek-sang

Hyun-Sung Jang

Hong Gye-Hee

Ha Seung-Ri

Queen Jeongsoon

Byung-ho Son

Kim Sung-ik

Kim Chang-wan

Kim Taek

Won-jong Lee

Park Moon-soo

Jeong-hak Kim

Jang Hwi-ryang

Yoon Seo-hyun

Cheon Seung-se

Min-jong Kim

Na Cheol-joo

Jang In-sub

Jang Dong-gi

Hyeon-suk Park

Court Lady Choi

Ha-Kyun Kim

Kim Sang-Ro