as Young Kim Su-hong
as Yeon-woo
as Young-nam
as Young Park Hoon(20 eps)
as Young Jeong-jo
as Hwang Chi-woong
as Park Soo-Ha (young)(18 eps)
as Young Choi Kang-ho
as Han Eun-gi
as Kid at Rehab
as Kang Chae-yoon and Dam's eldest son(24 eps)
as Park Chan-noh(50 eps)
as Oh Jung-min(16 eps)
as Young Sang-man
as Hwang Hyun-joon
as Prince Yeongchin
as Hong Chan-doo (young)(16 eps)