100 Days My Prince

Composer

• 
  Jung Se Rin

Director

• 
  Lee Jong Jae
• 
  Nam Sung Woo

Executive Producer

• 
  Lee Jung Mook

Screenwriter

• 
  Noh Ji Sul

Main Role

• 
  Doh Kyung Soo

  Crown Prince Yi Yul/ Na Won Deuk

  Main Role
• 
  Nam Ji Hyun

  Hong Sim / Yun I Seo

  Main Role
• 
  Kim Seon Ho

  Jung Jae Yun

  Main Role

Support Role

• 
  Han So Hee

  Kim So Hye [Crown Princess]

  Support Role
• 
  Cho Seong Ha

  Kim Cha Eon

  Support Role
• 
  Kim Jae Yeong

  Mu Yeon / Yun Seok Hwan

  Support Role
• 
  Jo Han Chul

  [King]

  Support Role
• 
  Oh Yeon Ah

  Queen Park

  Support Role
• 
  Ji Min Hyuk

  Prince Seo Won

  Support Role
• 
  Jung Hae Kyun

  Yun [Hong Sim's adopted father]

  Support Role
• 
  Heo Jung Min

  Kim Su Ji

  Support Role
• 
  Lee Hye Eun

  Yang Chun

  Support Role
• 
  Ahn Suk Hwan

  Park Sun Do [Lord]

  Support Role
• 
  Jo Hyun Sik

  Yang Nae Gwan

  Support Role
• 
  Kim Ki Doo

  Seo Gu Dol [Kkeut Nyeo's husband]

  Support Role
• 
  Lee Min Ji

  Park Kkeut Nyeo [Hong Sim’s best friend]

  Support Role
• 
  Jo Jae Ryong

  Cho Bu Yeong [Governor]

  Support Role
• 
  Lee Joon Hyuk

  Park Bok Eun [Town official]

  Support Role
• 
  Choi Woong

  Jung Sa Yeop [Chief censor]

  Support Role
• 
  Jung Soo Kyo

  Ma Chil [Loan shark]

  Support Role
• 
  Han Ji Eun

  Ae Weol [Gisaeng]

  Support Role
• 
  Kang Young Seok

  Kwon Hyeok [Palace guard]

  Support Role
• 
  Heo Jung Eun

  Yun I Seo [Young]

  Support Role
• 
  Jung Ji Hoon

  Yi Yul [Young]

  Support Role
• 
  Choi Myung Bin

  Kim So Hye [Young]

  Support Role
• 
  Jung Joon Won

  Yun Seok Hwan [Young]

  Support Role
• 
  Son Kwang Eop

  Jang Mun Suk [Palace minister / Kim Cha Un's right-hand man]

  Support Role
• 
  Lee Seung Hun

  Woo Ui Jeong [Palace minister]

  Support Role
• 
  Lee Seung Jun

  Min Yeong Gi

  Support Role
• 
  Hong Yun Jae

  Hyeok [Mu Yeon's man]

  Support Role
• 
  Im Seung Joon

  Beom [Mu Yeon's man]

  Support Role
• 
  Noh Yi Han

  Mok Gu

  Support Role
• 
  Lee Gyu Bok

  Eunuch Song

  Support Role
• 
  Lee Chae Kyung

  [So Hye’s personal attendant]

  Support Role
• 
  Lee Seon Hee

  [Restaurant owner]

  Support Role
• 
  Park Seon Woo

  [Palace minister]

  Support Role
• 
  Lee Jin Mok

  [Book store owner]

  Support Role
• 
  Lee Chae Min

  [Gisaeng]

  Support Role

Guest Role

• 
  Do Ji Han

  Dong Ju [Yi Yul's guardian]

  Guest Role
• 
  Jung Ho Bin

  Yun Bu Jun [Yun I Seo's father / Lord] (Ep. 1)

  Guest Role
• 
  Choi Ji Na

  [Yi Yul's mother] (Ep. 1)

  Guest Role
• 
  Park Gwang Jae

  [Woodsman] (Ep. 1)

  Guest Role
• 
  Tae Won Seok

  [Big man at soup stall] (Ep. 4)

  Guest Role
• 
  Choi Gyo Shik

  [Shoe shop owner] (Ep. 7)

  Guest Role
• 
  Baek Soo Min

  [Noble young master #1] (Ep. 4)

  Guest Role
• 
  Im Jae Ha

  [Noble young master #2] (Ep. 4)

  Guest Role
• 
  Hong Sung Min

  [Noble young master #3] (Ep. 4)

  Guest Role
• 
  Ahn Se Ha

  Heo Man Sik [Secret Royal inspector] (Ep. 5, 7)

  Guest Role
• 
  Kim Dong Wan

  [Minister Kim's man]

  Guest Role
• 
  Jin Ji Hee

  Jin Lin (Ep. 13)

  Guest Role
• 
  Yoo Gun Woo

  [Mu Yeon's man] (Ep. 14)

  Guest Role
• 
  Jin Hyun Kwang

  O Nae Gwan

  Guest Role
• 
  Kim Na Moo

  Kang Do Cheol

  Guest Role
• 
  Jang Myung Gap

  Envoy Wang

  Guest Role
• 
  Kum Chae Ahn

  Song Seon [Nurse]

  Guest Role
• 
  Lee Shi Woo

  Dong Ju [Young]

  Guest Role
• 
  Jang Joon Young

  [Palace escort guard]

  Guest Role
• 
  Dong Yoon Seok

  [Checking ID at Hanyang Gate]

  Guest Role
• 
  Han Da Hee

  [Hired fake boyfriend]

  Guest Role
• 
  Yun Hae Bin

  [Battleground child]

  Guest Role
• 
  Kim Woo Rin

  [Spy court lady]

  Guest Role
• 
  Yeo Woon Bok

  [Aristocrat]

  Guest Role
• 
  Son Seung Hun

  [Royal guard of Naegeumwi, protecting royal family]

  Guest Role
• 
  Yoo Young Bin

  [Boatman]

  Guest Role
• 
  Oh Jin Seok

  [Miner]

  Guest Role
• 
  Choi Na Moo

  [Queen's court lady]

  Guest Role
• 
  Park Joon Soo

  [Police officer]

  Guest Role
• 
  Lee Gyu Sub

  [Banquet hall eunuch]

  Guest Role
• 
  Jin Shi Won

  [Constable following Song Ju Hyeon]

  Guest Role
• 
  Kim Sang Gyeom

  [Soldier]

  Guest Role
• 
  Na Joo Ho

  [Ruffian]

  Guest Role
• 
  Oh Kyung Min

  [Lowest class person]

  Guest Role
• 
  Jo Yoon Ho

  [Ginseng digger]

  Guest Role
• 
  Ji Sung Geun Guest Role
• 
  Kim Tae Young Guest Role
• 
  Lee Ho Sung Guest Role
• 
  Kang Min Tae Guest Role
• 
  Kwon Hyuk Soo Guest Role
• 
  Kim Dae Kook Guest Role
• 
  Jang Tae Min Guest Role
• 
  Seo Young Sam Guest Role
• 
  Lee Won Jin Guest Role
• 
  Hong Boo Hyang Guest Role
• 
  Yoo Young Bok Guest Role
• 
  Kim Chan Yi Guest Role
• 
  Nam Ri An Guest Role

Unknown

• 
  Min Jung Sup Unknown
• 
  Choi Yong Min Unknown
• 
  Yoon Hee Won Unknown
• 
  Bang Joo Hwan Unknown
• 
  Mi Seok Unknown
• 
  Shin Ye On Unknown
• 
  Han Sa Myung Unknown
• 
  Park Won Seok Unknown
• 
  Kwon Tae Hee Unknown
• 
  Kim Su Jin

  [Court lady]

  Unknown