Lee Yo Won as Deokman/Queen Seondeok
Nam Ji Hyun as young Deokman
Ko Hyeon-jeong as Lady Misil
UEE as young Lady Misil
Park Ye-Jin as Princess Cheonmyeong
Shin Se Kyung as young Princess Cheonmyeong
Uhm Tae Woong as Kim Yushin
Lee Hyun Woo as young Kim Yushin
Kim Nam Gil as Bidam
Park Ji Bin as young Bidam
Yu Seung-ho as Kim Chunchu
Lee Seung-hyo as Alcheon
Extended Cast
Jo Min Ki as King Jinpyeong (Deokman's Father)
Baek Jong Min as young Jinpyeong
Kang San as child Jinpyeong
Yoon Yoo Sun as Lady Maya (Deokman's Mother, Kim Jinpyeong's wife)
Park Soo Jin as young Lady Maya
Seo Young Hee as So Hwa
