Empress Cheonchu

Young Empress Seonjeong

Chun Hyang-bi, a Warrior in Myeongbok Palace and Empress Cheonchu's bodyguard. She is Kang-Jo's wife. Kim Ye-won as young Chun Hyang-bi

King Gyeongjong Cha Jae-dol as young Gyeongjong

King Mokjong (Gyeongjong and Empress Cheonchu's son) Park Ji-bin as young Mokjong

Kim Chi-yang Lee Jin-suk as young Kim Chi-yang

Seo-Hee, Gyeongjong, Seongjong and Mokjong's people.

Gang Jo

Kim Won-soong, Seongjong's in-law and people. He is Silla's warrior.

Young Hwangbo Soo

Wang Wook, Prince Gyeongjuwon

Young Mokjong

Empress Wonjeong Lee Ra-hye as young Empress Wonjeong Seongjong and Princess Yeonheung's daughter who has a good personality and take good care of her parent. However, she only receives cold treatment from Hyeonjong, her husband.

Young Chun Hyang-bi

Young Prince Hwangjuwon

Han Deok-yang (Han Derang) Empress Yeji's trusted person and Khitan-Liao's prime minister.

Jang Myung-kil – Hyeonjong's eunuch.

Young Empress Mundeok

Empress Daemok (cameo) Gwangjong's primary wife and formerly half sister who killed by his sword while trying to prevent the attempt to kill their son (the-young-Gyeongjong) during Gwangjong's slaughtering politics.

Empress Wonpyeong (Hyeonjong's 7th wife and Kim Eun-bu's 3rd daughter)

Lee Ji-baek, Gyeongjong and Seongjong's people.

Young Hwangbo Seol

General Gang Gam-chan

So Jak, Empress Yeji (Xiao Chuo) Khitan-Liao's Empress Dowager and Emperor Seongjong's mother.

Hwangbo Soo, later Empress Cheonchu Kim So-eun as young Hwangbo Soo

Empress Dowager Sinjeong Taejo's 4th wife who represents the position of the Hwangju supporters and raised all of her grandchildren instead of her son and daughter-in-law who died early. However, she became angry and died suddenly when her grandson, Seongjong whom she trusted betrayed her.

Empress Munhwa Kim Min-ji as young Empress Munhwa Kim Won-sung's daughter whom originally about marry Gyeongjong, but later instead became Seongjong's concubine. With the restraint of the Hwangju's power who found out about her family, she was promoted to the queen position. She initially kind and care with her husband's family, but soon after he fell ill and she acted as deputy for a while, she then slowly shows her desire for power. When he died in anger because of stress, she harbors hostility to Empress Cheonchu and working with Kim Won-sung and Silla peoples to interfere with Empress Cheonchu. Although she applies that to Cheonchu almost every time, but she still survives under Mokjong's protection. After Kim Chi-yang's rebellion, she choose her own daughter as Hyeonjong's primary wife so she can entered the palace again. After preventing the second invasion of the Khitan, Hyeonjong who had a stronger voice, told her to not too meddle in politics which she then laughed by Empress Cheonchu when they meet again.

Empress Seonjeong Han Bo-bae as young Empress Seonjeong Empress Mundeok's daughter who raised by Seongjong, her stepfather from child. She later married Mokjong, but since they two were grow up like a sibling from young, so Mokjong doesn't like or see her as a spouse. As she never has any children, so they are living in a cold state and suffer only from hardships here and there. Even so, she cares and always follow his mother, Empress Cheonchu until the end of the episode.

Kim Mil-hwa, Lady Yoseok A woman who forget her real identity as Kim Won-Sung's subordinate and succeeded in gaining Mokjong's favor, but failed to have children. In the end, she later commits adultery with Kim Yung-dae, who is her biological older brother and have a child with him. She then caught by the guard and killed by an angry minister.

Sa Il-ra, Kim Chi-yang's close aide and Sa Ka-moon's little sister. She later become Empress Cheonchu's bodyguard.