The K2

Composer

• 
  Choi Chul Ho

Director

• 
  Kwak Jung Hwan

Screenwriter

• 
  Jang Hyuk Rin

Main Role

• 
  Ji Chang Wook

  Kim Je Ha

  Main Role
• 
  Lim Yoon A

  Go An Na

  Main Role
• 
  Song Yoon Ah

  Choi Yoo Jin

  Main Role
• 
  Cho Seong Ha

  Jang Se Joon

  Main Role

Support Role

• 
  Kim Gab Soo

  Park Kwan Soo

  Support Role
• 
  Lee Jung Jin

  Choi Sung Won [JB Group CEO / Yoo Jin's brother]

  Support Role
• 
  Shin Dong Mi

  Kim Dong Mi [Yoo Jin's chief secretary]

  Support Role
• 
  Lee Ye Eun

  Jang Mi Ran / "J4" [An Na's bodyguard]

  Support Role
• 
  Lee Jae Woo

  Lee Sung Kyu / "K1" [An Na's bodyguard]

  Support Role
• 
  Jeon Bae Soo

  Ju Cheol Ho [Yu Jin's bodyguard team chief]

  Support Role
• 
  Son Tae Young

  Uhm Hye Rin [An Na's mother]

  Support Role
• 
  Song Kyung Chul

  Song Young Choon [Master]

  Support Role
• 
  Park Soon Chun

  [Sung Won's mother]

  Support Role
• 
  Lee Chul Min

  [Kwan Soo's secretary]

  Support Role
• 
  Go In Beom

  Kook Chae Wan

  Support Role
• 
  Lee Yu Ju

  Go An Na [Young]

  Support Role
• 
  Yeom Hye Ran

  [An Na's housemaid]

  Support Role

Guest Role

• 
  Joo Sae Byuk

  [Se Joon's mistress] (Ep. 1)

  Guest Role
• 
  Yoo Seung Mok

  Congressman Kim (Ep. 3, 12)

  Guest Role
• 
  Jo Hee Bong

  [Policeman] (Ep. 2-3)

  Guest Role
• 
  Carson Allen

  Raniya [Korean translator] (Ep. 3)

  Guest Role
• 
  Sung Dong Il

  [Detective] (Ep. 3)

  Guest Role
• 
  Tae Won Seok

  [Detective] (Ep. 3)

  Guest Role
• 
  Joo Seok Tae

  [Man who opens the bag of the deceased's will at the funeral] (Ep. 5)

  Guest Role
• 
  Kim Bo Mi

  [Girl who took a Selfie] (Ep. 6 -7)

  Guest Role
• 
  Lee Han Wi

  [Blue House chief of staff] (Ep. 7, 10)

  Guest Role
• 
  Cho Byeong Kyu

  [Cafe part-timer] (Ep. 8)

  Guest Role
• 
  Jo Dong Hyuk

  [JSS Special Division leader] (Ep. 8)

  Guest Role
• 
  Jung Dong Geun

  [Prosecutor] (Ep. 8, 14)

  Guest Role
• 
  Jeon Soo Yeon

  [Nurse] (Ep. 13)

  Guest Role
• 
  Lee Se Rang

  [Hair salon customer] (Ep. 13)

  Guest Role
• 
  Kim Mi Hye

  [Anchorwoman] (Ep. 14)

  Guest Role
• 
  Bae Eun Woo

  [Flight attendant] (Ep. 15)

  Guest Role
• 
  Shin Dong Hoon

  Kim Ki Ja

  Guest Role
• 
  Jung Ji Young

  No Ji Yun

  Guest Role
• 
  Yoon Jong Hwa

  Kim Suk Han

  Guest Role
• 
  Kim Kyung Ryong

  Lee Kyung Jin

  Guest Role
• 
  Jo Jae Ryong

  Secretary Sung

  Guest Role
• 
  Joey Albright

  Scott [Soldier]

  Guest Role
• 
  Choi Seung Hoon

  Kim Je Ha [Young]

  Guest Role
• 
  Lee Soon Won

  Seo [JSS bodyguard team leader]

  Guest Role
• 
  Lee Won Jin

  [FD]

  Guest Role
• 
  Kim Hyun

  [Guide]

  Guest Role
• 
  Han Hye Ji

  [Reporter]

  Guest Role
• 
  Park Geon Rak

  [Inspector]

  Guest Role
• 
  Lee Seung Jun

  [Examiner]

  Guest Role
• 
  Lee Yoo Soo

  [Detective]

  Guest Role
• 
  Jung Se Hyung

  [Detective]

  Guest Role
• 
  Yoo In Hyuk

  [Bodyguard]

  Guest Role
• 
  Yoon Joo Bin

  [Bodyguard]

  Guest Role
• 
  Lee Su Ryeon

  [Bodyguard]

  Guest Role
• 
  Kwon Soo Hyun

  [Bodyguard]

  Guest Role
• 
  Oh Sang Hoon

  [Task force leader]

  Guest Role
• 
  Kim Ik Tae

  [Fruit ranch farmer]

  Guest Role
• 
  Ji Tae Yang

  [Scarred policeman]

  Guest Role
• 
  Yoon Sung Woo

  [Young Je Ha's friend]

  Guest Role
• 
  Ham Jin Sung

  [Kwan Soo's bodyguard]

  Guest Role
• 
  Son Dong Hwa

  [Reserve forces member]

  Guest Role
• 
  So Hee Jung

  [JSS chief medical doctor]

  Guest Role
• 
  Sung Ian Guest Role
• 
  Lee Se Mi Guest Role
• 
  Park Geon Guest Role
• 
  Jang Hae Song Guest Role
• 
  Choi Won Yong Guest Role

Bit part

• 
  Anupam Tripathi Bit part

Unknown

• 
  Chu Yeon Gyu Unknown
• 
  Min Sang Woo Unknown
• 
  Hong Ru Hyeon Unknown
• 
  Park Gun Unknown