IU
Go Ha-jin / Hae-soo (20 eps)
Lee Joon-gi
4th Imperial Prince Wang So (20 eps)
Kang Ha-neul
8th Imperial Prince Wang Wook (20 eps)
Hong Jong-hyun
3rd Imperial Prince Wang Yo (20 eps)
Baekhyun
10th Imperial Prince Wang Eun (20 eps)
Nam Joo-hyuk
13th Imperial Prince Wang Yoo (20 eps)
Kim Ji-soo
14th Imperial Prince Wang Jung (20 eps)
Yoon Sun-woo
9th Imperial Prince Wang Won (20 eps)
Kim San-ho
Eldest Prince Wang Mu (20 eps)
Seohyun
Woo-hee (20 eps)
Kang Han-na
Hwangbo Yeon-hwa (20 eps)
Jin Ki-joo
Chae-ryung (20 eps)
Z.Hera
Park Soon-duk (20 eps)
Sung Dong-il
Park Soo-kyung (20 eps)
Kim Sung-kyun
Choi Ji-mong (20 eps)
Jo Min-ki
King Tae-jo (20 eps)
Kim Kang-il
Kang of Shincheon (20 eps)
Park Ji-young
Queen Yoo (20 eps)
Park Jeong-hak
Wang Shik-ryum (20 eps)
Woo Hee-jin
Court Lady Oh (20 eps)
Park Si-eun
Lady Hae (20 eps)
Jung Kyung-soon
Queen Hwangbo (20 eps)
Choi Byung-mo
Park Young-gyoo (20 eps)
Lee Ho-jung
Ae-ra (20 eps)
Byeon Woo-seok
Go Ha-Jin's boyfriend (1 eps)