Diamond Cuts Diamond

Choi Soo-jong

Kim Chunchu

Chae Sang-woo

Chunchu (young)

Kim Yu-seok

Kim Yushin

Noh Young-hak

Yushin (young)

Lee Young-ah

Queen Jindeok

Park Joo-mi

Princess Deokman (episodes 1-18)

Hong Eun-hee

Princess Deokman (episodes 19-70)

Jeong Dong-hwan

Kim Yongchun

Jung Da-bin

Gotaso (young)

Lee Jong-soo

Kim Beopmin

Park Gri-na

Gotaso

Choi Il-hwa

Kim Seohyeon

Kim Ye-ryeong

Madam Manmyeong

Choi Cheol-ho

Bidam

Lee Se-young

Chun Gwan-nyeo