DRAMA MANIAC

• Oh Man Suk as Kim Cheo Seon
• Goo Hye Sun as Yoon So Hwa
• Ko Joo Won as King Seongjong
• Lee Jin as Jung Hyun
• Jun Kwang Ryul as Jo Chi Kyeom (head of the eunuchs)
• Jun In Hwa as Queen Dowager Insu (Seongjong's mother)
• Yang Mi Kyung as Queen Mother Jeonghee (Seongjong's grandmother)
• Jun Hye Bin as Seol Young (Chi Kyeom's adoptive sister)
• Ahn Jae Mo as Jung Han Soo (eunuch)
• Shin Goo as Noh Nae Si (Chi Kyeom's adoptive father / former eunuch)
• Kim Soo Mi as Soginopa (person in charge of discipline at the eunuch training place)
• Yoon Yoo Sun as Wol Hwa (Cheo Seon's foster mother / Soginopa's daughter)

Extended Cast

• Han Jung Soo as Do Geum Pyo (eunuch)
• Kang In Hyung (강인형) as Moon So Un (eunuch / Cheo Seon's friend)
• Kang Nam Gil as Choi Cham Bong
• Kim Ha Kyoon as Jang Soon Woo
• Ahn Kil Kang as Gae Do Chi (knifesmith)
• Kim Hyuk (김혁) as Park Deok Hu (Lady Yoon's first love)
• Jung Eun Chan (정은찬) as Yoon Ki Hyun (Lady Yoon's older brother)
• Lee Geon Joo (이건주) as Song Gye Nam (Cheo Seon's fellow eunuch)
• Kim So Hyun as Lady Jung (Chi Kyeom's wife)
• Yang Jung Ah as Oh-ssi (Cheo Seon's mother)
• Kim Jung Min as Beodeuri
• Lee Young Eun as palace member
• Kim Da Hyun as Choi Ja Chi
• Kim Yong Heon as Eom Nae Kwan
• Kim Myung Soo as Yang Sung Yoon
• Kim Byung Chun (김병춘) as Yang Seong Yun
• Kim Jong Kyu as Han Myung Hwe (Jung Hyun's father / minister)
• Park Dong Bin as Goo Sung Gun (minister)
• Yoon Hye Kyung as Eom Gwui In
• Jung Yoon Suk
• Yoo Min Ho as King Yejong (Seongjong's uncle)
• Joo Min Soo as young Cheo Seon
• Park Bo Young as young So Hwa
• Yoo Seung Ho as young Jaeulsangun (King Seongjong)
• Jun Han Eun as young So Un
• Jo Jung Eun as young Beodeuri
• Baek Seung Do as young Han Soo
• Maeng Chang Min as young Song Gye Nam
• Sun Woo Jae Duk as Yoon Ki Kyun (So Hwa's father)
• Choi Jung Won as Lady Shin (Ki Kyun's wife)
• Ho Hyo Hun as young Ki Hyun
• Kim Byung Se as King Sejo
• Lee Il Jae as Kim Ja Myeong (Cheo Seon's father)