The King : Eternal Monarch

Lee Min-ho

Lee Gon

Kim Go-eun

Jung Tae-eul / Luna

Woo Do-hwan

Jo Eun-sup / Jo-young

Kim Kyung-nam

Kang Shin-jae

Jung Eun-chae

Goo Seo-ryung / Goo Eun-ah

Lee Jung-jin

Lee Rim

Jeon Moo-song

Lee Jong-in / Prince Boo-young

Kim Young-ok

Noh Ok-nam

Jeon Bae-soo

Jung Do-in

Seo Jeong-yeon

Song Jung-hye

Park Won-sang

Park Moon-shik

박소진

Jo Hae-in

백현주

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

안시하

Kim Hee-joo

최우성

Kim Ki-won

Jung Hyeon-jun

Young Lee Gon / Lee Ji-hun

김시우

Young Jung Tae-eul