Name	Known for
Yoon Eun-hye Chae-kyung Shin (as Yun Eun-hye) Chae-kyung Shin (as Yun Eun-hye) See fewer	The 1st Shop of Coffee Prince (2007)
Ju Ji-hoon Crown Prince Lee Shin Crown Prince Lee Shin See fewer	The Spy Gone North (2018)
Song Ji-hyo Min Hyo-rin Min Hyo-rin See fewer	New World (2013)
Park Chan-hwan Emperor Hyun (Shin's father) Emperor Hyun (Shin's father) See fewer	The King and the Queen (1998)
Bool-am Choi Emperor Sungjo (Shin and Yul's grandfather) Emperor Sungjo (Shin and Yul's grandfather) See fewer	The Last Witness (1980)
Danji Yoon Hee-Sung Yoon Hee-Sung See fewer	The Man Who Can't Get Married (2009)
Kim Hye-ja Queen Mother (Yul and Shin's grandmother) Queen Mother (Yul and Shin's grandmother) See fewer	Mother (2009)
Shim Hye-jin Lady Hwa-yong (Yul's mother) Lady Hwa-yong (Yul's mother) See fewer	The Gingko Bed (1996)
Kim Jeong-hoon Prince Yul Prince Yul See fewer	Pacific Rim: Uprising (2018)
Kang Nam-kil Chae-kyung's father (as Nam-Gil Kang) Chae-kyung's father (as Nam-Gil Kang) See fewer	Jejoongwon (2010)
Kim Sang-jung Crown Prince Hyo Yeol (Yul's father) (as Sang Jung Kim) Crown Prince Hyo Yeol (Yul's father) (as Sang Jung Kim) See fewer	The Rebel Hong Gil Dong (2017)
Im Ye-jin Chae-kyung's mother Chae-kyung's mother See fewer	Secret Love (2010)
Yun Yoo-sun Queen Min (Shin's mother) (as Yoon Yoo-sun) Queen Min (Shin's mother) (as Yoon Yoo-sun) See fewer	The Story of Two Women (1994)
Lee Yoon-ji Princess Hye-myung (Shin's sister) Princess Hye-myung (Shin's sister) See fewer	Dream High (2011)