Cast from Secret Door

Lee Je-hoon

Crown Prince Sado

Kim You-jung

Seo Ji-dam

Yoon So-hee

Seo Ji-dam / Park Bingae

Han Suk-kyu

King Yeongjo

Park Eun-bin

Lady Hyegyeong

Kim Min-jong

Na Chul-joo

Lee Won-jong

Park Mun-su

Kwon Hae-hyo

Seo Kyoon

Jeon Kuk-hwan

Lee Jong-sung

Jang Hyun-sung

Hong Gye-hui

Uhm Hyo-seop

Min Baek-sang

Kim Ha-kyoon

Kim Sang-ro

Choi Won-young

Chae Je-gong

Seo Jun-yeong

Shin Heung-bok

Ha Seung-lee

Queen Jeongsun

Park Hyo-ju

Woon-shim

Kim Tae-hun

Kang Pil-jae

Jeong Gyu-su

Yang Soon-Man

Kwak Hee-Sung

Kim Moo

Jo Woo-jin

Lee Dal-seong

Kim Woo-seok

Lee Seon [Young] / Lee San [Young]

Lee Won-jae

Kang Seo-won