The King: Eternal Monarch

Composer

• 
  Gaemi

Director

• 
  Baek Sang Hun
• 
  Jung Ji Hyun
• 
  Yoo Je Won

Producer

• 
  Yun Ha Rim

Screenwriter

• 
  Kim Eun Sook

Main Role

• 
  Lee Min Ho

  Lee Gon

  Main Role
• 
  Kim Go Eun

  Jung Tae Eul | Luna

  Main Role
• 
  Woo Do Hwan

  Jo Eun Seop | Jo Yeong

  Main Role
• 
  Lee Jung Jin

  Yi Rim | Lee Sung Jae

  Main Role
• 
  Kim Kyung Nam

  Kang Shin Jae

  Main Role
• 
  Jung Eun Chae

  Goo Seo Ryung

  Main Role

Support Role

• 
  Park Won Sang

  Park Moon Shik [Team leader]

  Support Role
• 
  Kim Young Ok

  No Ok Nam [Head court lady who raises Yi Gon]

  Support Role
• 
  Jeon Bae Soo

  Jung Do In [Tae Eul's father / Taekwondo instructor]

  Support Role
• 
  Seo Jung Yeon

  Song Jung Hye

  Support Role
• 
  Kim Yong Ji

  Myung Na Ri [Building owner] | Myung Seung Ah [Employee on duty at the Royal Press Office]

  Support Role
• 
  Hwang Young Hee

  Min Hwa Yun [Shin Jae's mother] / Park Sook Jin / Min Son Young [Palace staff]

  Support Role
• 
  Heo Dong Won

  Shim Hyung Sa [Homicide detective]

  Support Role
• 
  Jeon Moo Song

  Yi Jong In [Member of the royal family]

  Support Role
• 
  Ahn Shi Ha

  Kim Hee Joo [National Forensic Service autopsy doctor] | Kim Joo Hyun [Central Forensic Medical Center autopsy doctor] (Ep. 13)

  Support Role
• 
  Kang Hong Suk

  Jang Michael [Homicide detective] | Jang Mi Reuk [Royal guard trainee] (Ep.13)

  Support Role
• 
  Lee Hae Young

  Yoo Gyung Moo [Yi Rim's subordinate]

  Support Role
• 
  Lee Hong Nae

  Suk Ho Pil [Second captain of the Royal Guards]

  Support Role
• 
  Park So Jin

  Jo Ha In [Psychiatrist]

  Support Role
• 
  Baek Hyeon Ju

  Secretary Mo [Lee Gon's general secretary]

  Support Role
• 
  Song Sang Eun

  Kyung Ran [Tae Eul's fellow police officer]

  Support Role
• 
  Kang Gi Doong

  Mr. Kim [Seo Ryung's assistant]

  Support Role
• 
  Kim Jung Young

  [Seo Ryung's mother]

  Support Role
• 
  Kim Hyun Woo

  Yoon Hwan Soo

  Support Role
• 
  Choi Woo Sung

  Kim Gi Won

  Support Role
• 
  Hwang Se On

  Park In Young [Royal guard]

  Support Role
• 
  Park Ji Yeon

  Park Ji Young | [Pregnant woman] (Ep. 5, 8, 12-13, 15)

  Support Role
• 
  Lee Hwang Ui

  [Seo Ryung's advisor]

  Support Role

Guest Role

• 
  Joo Ye Rim

  Min Ji (Ep. 1)

  Guest Role
• 
  Jung Shi Yool

  Jo Young [Young] (Ep. 1)

  Guest Role
• 
  Baek Seung Chul

  [Security guard] (Ep. 1)

  Guest Role
• 
  Heo Jae Ho

  Kim Bok Man (Ep. 1-2)

  Guest Role
• 
  Go Eun Min

  Song Jung Hye [Young] (Ep. 1-2, 16)

  Guest Role
• 
  Kim Ki Moo

  [Gang Boss] (Ep. 1-2, 6)

  Guest Role
• 
  Kim Wook

  Choi Nam Jin (Ep. 1, 4) | [School bully] (Ep. 6, 16)

  Guest Role
• 
  Jung Hyun Joon

  Lee Gon [Young] (Ep. 1, 4, 9, 16) | Lee Ji Hun (Ep. 1)

  Guest Role
• 
  Kwon Yul

  King Yi Ho [Lee Gon's father] (Ep. 1, 4, 14)

  Guest Role
• 
  Ryu Sung Rok

  Park Gyu Bong [Tailor] (Ep. 1, 4, 6, 12)

  Guest Role
• 
  Son Kyung Won

  Seung Heon [Yi Jong In's eldest son] (Ep. 1, 11, 15)

  Guest Role
• 
  Yoon Joo Man

  Yoo Gyung Moo [Young] (Ep. 1, 11, 16)

  Guest Role
• 
  Yoon Sung Woo

  Myung Ho (Ep. 2)

  Guest Role
• 
  Kim Jong Tae

  Lee Sang Do (Ep. 2) | [Stable worker] (Ep. 7, 9, 11-12)

  Guest Role
• 
  Lee Hye Ra

  Park Soo Yun (Ep. 2)

  Guest Role
• 
  Jung Ye Na

  Jo Eun Bi (Ep. 2, 6, 10, 13, 15)

  Guest Role
• 
  Seol Woo Hyung

  Jo Eun Woo (Ep. 2, 6, 10, 13, 15)

  Guest Role
• 
  Cha Sung Je

  [Birthday party boy] (Ep. 2)

  Guest Role
• 
  Seo Jang Hyun

  [Birthday party boy] (Ep. 2)

  Guest Role
• 
  Choi Moo In

  Kang Jun Hyuk [Detective] (Ep. 2-10)

  Guest Role
• 
  Yang Jo Ah

  Ms. Baek [Myung Ho's mother] (Ep. 2, 12, 14-15)

  Guest Role
• 
  Hong Ye Ji

  Yoon Soon Kyung [Officer] (Ep. 3)

  Guest Role
• 
  Lee Ho Chul

  [Gang boss] (Ep. 3, 8)

  Guest Role
• 
  Do Yeong Seo

  [Yo-Yo kid] (Ep. 3-4, 8-11, 14, 16)

  Guest Role
• 
  Yang Hyun Min

  [Gambling boss] (Ep. 3-4, 9)

  Guest Role
• 
  Kim Sung Gon

  [Detective] (Ep. 4)

  Guest Role
• 
  Song Hoon

  [Photographer] (Ep. 4)

  Guest Role
• 
  Ahn Jung Ho

  [Arrested criminal] (Ep. 4)

  Guest Role
• 
  Jeon Noh Min

  Choi Gi Taek (Ep. 4, 6)

  Guest Role
• 
  Jang Hae Min

  [Staff] (Ep. 4, 7-8, 11)

  Guest Role
• 
  Lee Yoon Jae

  [Government official] (Ep. 4, 6)

  Guest Role
• 
  Shin Hyun Jong

  Lee Jung Hoon [Horse doctor] (Ep. 5, 7, 9)

  Guest Role
• 
  Ha Seung Yeon

  [Train booking clerk] (Ep. 5)

  Guest Role
• 
  Jo Jae Yun

  [Arcade worker] (Ep. 5, 7)

  Guest Role
• 
  Park Yong

  [Military official] (Ep. 6)

  Guest Role
• 
  Garrison Michael Farquharson-Keener

  [BDC News Anchor] (Ep. 6)

  Guest Role
• 
  Seong Chan Ho

  [Government official] (Ep. 6)

  Guest Role
• 
  Lee Yoon Sang

  [Government official] (Ep. 6)

  Guest Role
• 
  Moon Hak Jin

  [Man with Lee Jong In] (Ep. 6)

  Guest Role
• 
  Yang Ji Soo

  [Jo Young's uncle] (Ep. 6-7, 10)

  Guest Role
• 
  Jung Ha Dam

  Yu Jung Hwa (Ep. 7)

  Guest Role
• 
  Kim Kwi Seon

  Park Mun Haeng (Ep. 7)

  Guest Role
• 
  Moon Dong Hyeok

  Park Jung Gu (Ep. 7-8)

  Guest Role
• 
  Bae Seong Il

  Kim Gi Hwan [Vendor] (Ep. 1) / [Restaurant owner] (Ep. 7-9, 11)

  Guest Role
• 
  Ha Seung Ri

  Jang Yun Ji (Ep. 7-11, 16) / [Palace staff] (Ep. 1, 4, 7)

  Guest Role
• 
  Seo Dong Gap

  Park Byung Woo (Ep. 7) | [Republic of Korea traveler] (Ep. 7, 12)

  Guest Role
• 
  Moon Woo Jin

  Kang Sin Jae | Kang Hyeon Min [Young] (Ep. 7-16)

  Guest Role
• 
  Ahn Seok Hyun

  [Ice cream shop boy] (Ep. 8)

  Guest Role
• 
  Tae In Ho

  Choe Min Heon [Chairman] (Ep. 9-10)

  Guest Role
• 
  Bae Bo Ram

  [Reporter] (Ep. 10)

  Guest Role
• 
  Lee Ji Hyun

  [Eun Sub's mother] (Ep. 10)

  Guest Role
• 
  Min Eung Shik

  [Government official] (Ep. 10, 12)

  Guest Role
• 
  Kim Seung Tae

  [Government official] (Ep. 10, 12)

  Guest Role
• 
  Kang Moon Kyung

  [Government official] (Ep. 10, 12)

  Guest Role
• 
  Park Jung Eon

  [Restaurant manager] (Ep. 12)

  Guest Role
• 
  Lee Se Rang

  [Masseuse] (Ep. 13)

  Guest Role
• 
  Kim Woo Jin

  Lee Seung Heon [Young] (Ep. 14)

  Guest Role
• 
  Kim Dong Gyun

  [Sin Jae's father] (Ep. 14)

  Guest Role
• 
  Lee Ye Won

  Luna [Young] (Ep. 16)

  Guest Role
• 
  Woo Ji Hyun

  [Rookie] (Ep. 16)

  Guest Role
• 
  Yoon Jung Hyuk

  [Yo-Yo adult] (Ep. 16)

  Guest Role
• 
  Jang Ha Ran

  [Hyo Jin's mother] (Ep. 16)

  Guest Role
• 
  Seo Woo Jin

  [Prime Minister's son] (Ep. 16)

  Guest Role
• 
  Kim Shi Woo

  Jeong Tae Eul [Young]

  Guest Role
• 
  Shin Soo Yun

  Goo Seo Ryeong [Young]

  Guest Role
• 
  Yoo In Hyuk

  [Royal guard]

  Guest Role
• 
  Jung Se Hyun

  [Part-time worker]

  Guest Role
• 
  Kim Min Song

  [Lee Rim's assistant #2]

  Guest Role
• 
  Jin Geun Ho

  [Jo Young | Jo Eun Sub double]

  Guest Role
• 
  Park Hoon

  [Jo Young | Jo Eun Sub's father]

  Guest Role
• 
  Lee Chae Kyung

  [Great Democratic Party Member of National Assembly]

  Guest Role
• 
  Park Ung Sun

  Monk (Ep 2)

  Guest Role
• 
  Lee Jung Woo

  [Rowing player]

  Guest Role
• 
  Kang Joo Hee Guest Role
• 
  Kim Joo Eun Guest Role
• 
  Kim Sang Il

  [Big Data Lab manager] (Ep. 12)

  Guest Role
• 
  Noreen Joyce Guerra

  Moon Seung Il [Member of the Press]

  Guest Role
• 
  Jung Soo Ji

  Kim Soo Jin

  Guest Role
• 
  Park Gi Seon

  [Painter] (Ep. 6)

  Guest Role
• 
  Yoon Geum Seon Ah

  [Syung A's friend] (Ep. 1)

  Guest Role
• 
  Choi Gyo Shik

  [Jeweler] (Ep. 2)

  Guest Role
• 
  Ko Dong Ok

  [Gangster] (Ep. 1-2, 5)

  Guest Role
• 
  Lee Jae Woo

  [Cemetery employee] (Ep. 11)

  Guest Role
• 
  Jung Nan Hee Guest Role
• 
  Kim Su Ol

  [Bakery part time worker]

  Guest Role

Unknown

• 
  Kim Byung Chul Unknown
• 
  Park Ji Won Unknown
• 
  Lee Seung Joon Unknown
• 
  Lee Jeong Chan Unknown
• 
  Park Jun Hyuk Unknown
• 
  Gong Teyu Unknown
• 
  Park Young Bin Unknown
• 
  Chris Chan Unknown
• 
  Park Ki Duk

  Lieutenant Park (Ep. 3-4)

  Unknown
• 
  Chun Jung Ha

  [Yangsun Care Center manager] (Ep. 8, 13)

  Unknown
• 
  Na Seok Min

  [Royal guard] (Ep. 14)

  Unknown
• 
  Kim Tae Hwan Unknown
• 
  Han Seung Do Unknown