Kim Yeong-cheol (actor)

Yi Seong-gye, King Taejo, the founder and 1st King of Joseon.

Seo Gi-tae

Yi Seong-gye, Yi Bang-won's father

Byun Han-su/Lee Yoon-seok (60) — He is the owner of Father's Snack Bar and the patriarch of the family. He was a former Judo player back in high school but after being accused of a crime he did not do, he ended up going to jail and ruining his future. His identity was changed to Byun Han-soo after getting his identity switched with his best friend due to an accident. He was forced to keep this new identity after his wife Young-shil got pregnant with Joon-young, and decided that living as Byun Han-su would give him the opportunity to restart his life and save his children from the repercussions of being known as a criminal's children. Years later, when Ahn Joong-hee tracks him down, he learns that Joong-hee is the real Han-su's son and could not refuse Joong-hee's request to move in with him and his family out of guilt for the identity switch, and he decides to be the father that Joong-hee never had. He eventually grows to love Joong-hee and cares for him sincerely like his own son. They eventually become a real family when Joong-hee decides to marry Mi-yeong. With the help of his daughter Hye-young, Yoon-seok manages to clear his name and at the end of the series, he reverts to his actual name, and manages to get a driver's licence for the first time.

Baek San

Yi Bang-won, later King Taejong (1367–1422)

Bong Sam-bong Park Min-sang (ko) as child Sam-bong Park Hoon as young Sam-bong

Han Tae-oh, Young-won's father

Baek San Jung Suk-won as young Baek San

King Yeongnyu

CEO Seo Jung-gyu

Jin No-shik

Grand Prince Suyang Younger brother of King Munjong, he has his eyes firmly fixed on the throne. He is a ruthless politician, who will not countenance anyone standing in his way. Lee Se-ryung, his eldest daughter, is his weakness, but when she falls in love with the son of his enemy, he has no compunctions in eliminating Kim Seung-yoo and his entire family.

Yang Byung-tae

Choi Jin-lip

King Taejong; Sejong's father

Older Kim Du-han (Part 2)

Gung Ye Maeng Se-chang as young Gung Ye