- Seo Jeong-yeon - Song Jung-hye
- ??? - Park Moon-shik
- Park So-jin - Jo Hae-in
- Baek Hyun-joo - Lee Gon's Secretary
- Kang Hong-suk - Jang Michael / Jang Mi-reuk
- Kim Yong-ji - Myung Na-ri / Myung Seung-ah
- Lee Hong-nae - Seok Ho-pil
- An Si-ha - Kim Hee-joo
- Choi Woo-sung - Kim Ki-won
- Jung Hyeon-jun - Young Lee Gon / Lee Ji-hun
- Kim Shi Woo - Young Jung Tae-eul
- Moon Woo-jin - Young Shin-jae / Kang Hyun-min
- Noreen Joyce Guerra - Moon Seung-ih
- Lee Hae-yeong - Yoo Kyung-moo
- ??? - Young Yoo Kyung-moo
- Hwang Young-hee - Min Hwa-yun / Park Sook-jin
- Ryu Sung-rok - Kyu-bong
- Heo Dong-won - Detective Shim
- Song Sang-eun - Kyung-ran
- Hwang Se-on - Park In-young
- Shin Hyeon-jong - Lee Jung-hoon
- Lee Hwang-eui - Prime Minster's Adviser
- Kang Ki-doong - Secretary Kim
- Jang Hae-min - Prime Minster's Staff
- Kim Jung-young - Kim Sung-ae
- Kim Gwi-seon - Park Mun-haeng
- Kwon Yul - Lee Ho (the late emperor, Lee Gon's father)
- Tae In-ho - Choi Min Hwan
- Kim Dong-gyun - Kang Sin Jae's father
- Seo Woo-jin - Secretary Mo's son
- ???
- Yu Je-won
- Baek Sang-Hoon
- ???
- Yoon Ha-lim
- Jinnie Choi
- Gae-mi
Lee Min-ho hace el papel de Lee Gon.
Kim Go-eun hace el papel de Jung Tae-eul / Luna.
??? hace el papel de Jo Eun-sup / Jo-young.
??? interpreta a Kang Shin-jae en la serie.
??? interpreta a Goo Seo-ryung / Goo Eun-ah en la serie.
??? hace el papel de Lee Rim.
??? hace el papel de Lee Jong-in / Prince Boo-young.
Kim Yeong-ok hace el papel de Noh Ok-nam.
Jeon Bae-soo interpreta a Jung Do-in en la serie.
Seo Jeong-yeon interpreta a Song Jung-hye en la serie.
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