IU

Go Hajin / Lady Hae Soo

Lee Joon-gi

Wang So (4th Prince)

이준기

Ha-neul Kang

Wang Wook (8th Prince)

강하늘

Hong Jong-hyun

Wang Yo (3rd Prince)

홍종현

Baekhyun

Wang Eun (10th Prince)

백현

남주혁

Wang Baeka (13th Prince)

Kim Ji-soo

Wang Jeong (14th Prince)

김지수

윤선우

Wang Won (9th Prince)

김산호

Wang Mu (Crown Prince / 1st Prince)

Seohyun

Princess Woohee

서현

Kang Han-na

Princess Hwangbo Yeonhwa / Queen Daemok

강한나

Jin Ki-joo

Chaeryeong

진기주

Z.HERA

Park Soondeok

Sung Dong-il

General Park Soogyeong

성동일

김성균

Choi Jimong / Homeless Man

Jo Min-ki

King Taejo

조민기

Kim Kang-il

Shincheon Kang

김강일

Park Ji-young

Queen Yoo / Queen Shinmyeong

박지영

Park Jeong-hak

Wang Shikryeom

박정학

Woo Hee-jin

Court Lady Oh Sooyeon

우희진

Park Si-eun

Lady Hae Myeong

박시은

Jung Kyung-soon

Queen Hwangbo / Queen Shinjeong

정경순

Choi Byung-mo

Park Younggyu

최병모

Lee Ho-jung

Aera

이호정

Byeon Woo-seok

Ha-jin's Boyfriend

변우석

Jang Hae-min

Soo's friend

Lee Chae-mi

Wang Mu's daughter

Seo Eun-sol

So & Soo's daughter

서은솔