12.12: The Day

Cinematography

• 
  Lee Mo Gae

Composer

• 
  Lee Jae Jin

Costume Designer

• 
  Gwak Jeong Ae

Editor

• 
  Kim Sang Bum

Martial Arts Choreographer

• 
  Moon Kwang Shik

Screenwriter

• 
  Hong Won Chan
• 
  Lee Young Jong

Screenwriter & Director

• 
  Kim Sung Soo

Main Role

• 
  Hwang Jung Min

  Jeon Doo Gwang / "Director Jeon"

  Main Role
• 
  Jung Woo Sung

  Lee Tae Shin / "Director Lee"

  Main Role
• 
  Lee Sung Min

  Jeong Sang Ho / "Chief of Staff Jeong"

  Main Role
• 
  Park Hae Joon

  Noh Tae Geon / "9th Division Commander Noh"

  Main Role
• 
  Kim Sung Kyun

  Kim Jun Yeop / "Military Police Inspector Kim"

  Main Role

Support Role

• 
  Kim Eui Sung

  Oh Guk Sang [National Defense minister]

  Support Role
• 
  Jung Dong Hwan

  Choi Han Gyu [President]

  Support Role
• 
  Ahn Nae Sang

  Han Young Gyu [1st Corps commander]

  Support Role
• 
  Choi Byung Mo

  Do Hee Cheol [2nd Airborne Brigade commander]

  Support Role
• 
  Park Hoon

  Moon Il Pyeong [Chief of Staff to Jeon Doo Gwang]

  Support Role
• 
  Lee Jae Yoon

  Lim Hak Ju [Head of Security Investigation Dept.]

  Support Role
• 
  Kim Sung Oh

  Kim Chang Se [4th Airborne Brigade commander]

  Support Role
• 
  Yoo Sung Joo

  Min Seong Bae [Deputy chief of staff]

  Support Role
• 
  Nam Yoon Ho

  Kang Dong Chan [Operational staff of Sugyeongsa]

  Support Role
• 
  Hong Seo Joon

  Ha Chang Soo [Security personnel staff]

  Support Role
• 
  Ahn Se Ho

  Jang Min Ki [Head of 30th security guard of Sugyeongsa]

  Support Role
• 
  Jung Hyung Suk

  Park Ki Hong [8th Airborne Brigade commander]

  Support Role
• 
  Park Jung Hak

  Mo Sang Don [30th Division commander]

  Support Role
• 
  Park Won Sang

  Go Jae Young [3rd Army commander]

  Support Role
• 
  Park Min I

  Jin Young Do [Leader of 33rd Security Guards]

  Support Role
• 
  Yeom Dong Hun

  Bae Song Hak [Assistant Minister of Military Affairs]

  Support Role
• 
  Jeon Jin Ki

  Hyun Chi Seong [Capital Corps commander]

  Support Role
• 
  Choe Won Kyung

  Won Kyung [Military police commander]

  Support Role
• 
  Cha Rae Hyoung

  Heo Dong Yoon [Deputy head of military police]

  Support Role
• 
  Gong Jae Min

  Kim Byeong Jun [20th Division commander]

  Support Role
• 
  Kwon Hyuk

  Jo Woo Taek [Defense Division commander]

  Support Role
• 
  Han Chang Hyun

  Tak Jae Oh [6th Airborne Brigade commander]

  Support Role
• 
  Jeon Soo Ji

  [Lee Tae Shin's wife]

  Support Role
• 
  Seo Kwang Jae

  [Prime minister]

  Support Role
• 
  Im Chul Hyung

  [Presidential security chief]

  Support Role
• 
  Hyun Bong Sik

  [General joining rebel army]

  Support Role
• 
  Kwak Ja Hyung

  Colonel Lee [2nd Airborne]

  Support Role
• 
  Jeon Woon Jong

  Major Byeon [2nd Airborne]

  Support Role
• 
  Lee Seung Hee

  Lieutenant Colonel Park [4th Airborne]

  Support Role
• 
  Kim Ki Moo

  Captain Yoon [Arrest team]

  Support Role
• 
  Moon Sung Bok

  Yeom Gil Rok [Arrest team]

  Support Role
• 
  Kim Ok Joo

  [Jeon Doo Gwang's wife]

  Support Role
• 
  Park Jung Pyo

  [Haengju Bridge checkpoint guard]

  Support Role
• 
  Kwak Jin Seok

  [Head of security at Prime Minister's official residence]

  Support Role
• 
  Han Kyu Won

  Captain Son [Prime minister office]

  Support Role
• 
  Woo Mi Hwa

  Defense Minister Cheo

  Support Role
• 
  Cha Geon Woo

  Kim Dong Gyu [Former head of CIA]

  Support Role

Guest Role

• 
  Jeong Man Sik

  Kong Su Hyeok [Special Forces commander]

  Guest Role
• 
  Jung Hae In

  Oh Jin Ho [Special Forces major]

  Guest Role
• 
  Lee Jun Hyuk

  Kwon Hyung Jin [Bodyguard to chief of staff]

  Guest Role
• 
  Kang Seong Uk

  Min Ju Hwa [Reporter]

  Guest Role

Bit part

• 
  Eun Jong Geon

  [Special Forces information]

  Bit part
• 
  Kim Jung Seok

  General Seo [B2 Bunker]

  Bit part
• 
  Hwang Byung Kook

  General Hwang [B2 Bunker]

  Bit part
• 
  Choi Min

  General O [B2 Bunker]

  Bit part
• 
  Lee Soon Poong

  General Ma [B2 Bunker]

  Bit part
• 
  Kang Gil Woo

  Seol So Ryeong [Hanahoe Loyalty Pledge]

  Bit part
• 
  Kwon Hyuk Bum

  Lieutenant Colonel Hong [2nd Airborne]

  Bit part
• 
  Kim Bum Soo

  Jo Min Beom [B2 Bunker sergeant]

  Bit part
• 
  Ahn Sung Bong

  [Secretary to chief of staff of the Army]

  Bit part
• 
  Jang Ji Yong

  [Secretary to national defense minister]

  Bit part
• 
  Kwon Da Ham

  [Sugyeongsa lieutenant]

  Bit part
• 
  Jung Woo Young

  [Sugyeongsa situation officer]

  Bit part
• 
  Lee Ga Kyung

  [Sugyeongsa administrative officer]

  Bit part
• 
  Kang Min Jae

  [Sugyeongsa colonel]

  Bit part
• 
  Kim Nam Ho

  [Government spokesperson]

  Bit part
• 
  Lee Mi Ra

  [Banquet hall emcee]

  Bit part
• 
  Lee Jung Chul

  [B2 Bunker Jangseong]

  Bit part
• 
  Jin Hyun Kwang

  [B2 Bunker chief staff]

  Bit part
• 
  Yoon Chan

  [Jeon Doo Gwang's driver]

  Bit part
• 
  Yoo Sang Jae

  [26th Division commander]

  Bit part
• 
  Baek Jin Wook

  [Security agency wiretapping agent]

  Bit part
• 
  Choi Ji Ho

  [Sugyeongsa personnel staff]

  Bit part
• 
  Jung Tae Sung

  [Sugyeongsa military chief of staff]

  Bit part
• 
  Kim Seung Hwan

  [Sugyeongsa intelligence staff]

  Bit part
• 
  Yoon Dae Yeol

  Warrant Officer Yang [Arrest team]

  Bit part
• 
  Baek Seung Ik

  [Police officer in Arrest team]

  Bit part
• 
  Won Chun Gyu

  [9th Division deputy commander]

  Bit part
• 
  Hong Seong O

  [Security officer in plainclothes]

  Bit part
• 
  Paul Battle

  [US ambassador to Korea]

  Bit part
• 
  Jung Yun Ha

  Madame Park

  Bit part
• 
  Yoon Tae Soo

  Sgt. Bae [Gongwanchon Guard Post]

  Bit part
• 
  Jang Tae Hoon

  [Deputy chief of staff of the Army]

  Bit part
• 
  Nam Gi Hyung

  [8th Airborne Brigade commander adjutant]

  Bit part
• 
  Ri Min

  [Hannam-dong taxi driver]

  Bit part
• 
  Kim Sa Hun

  [National Defense Ministry reporter

  Bit part
• 
  Sung Do Hyun

  [Special Forces personnel staff]

  Bit part
• 
  Kwak Gi Hun

  [Presidential guard]

  Bit part
• 
  Maurice Turner Jr.

  [US Army lieutenant colonel]

  Bit part
• 
  Park Hyung Jun

  [Soldier]

  Bit part
• 
  Yoon Jung Hoon

  [Soldier]

  Bit part