Happy Together

Director

• 
  Oh Jong Rok

Screenwriter

• 
  Bae Yoo Mi

Main Role

• 
  Lee Byung Hun

  Seo Tae Poong

  Main Role
• 
  Song Seung Heon

  Seo Ji Suk

  Main Role
• 
  Kim Ha Neul

  Jin Soo Ha

  Main Role
• 
  Jun Ji Hyun

  Seo Yoon Joo

  Main Role
• 
  Kang Sung Yun

  Seo Moon Joo

  Main Role
• 
  Jo Min Su

  Seo Chan Joo

  Main Role

Support Role

• 
  Cha Tae Hyun

  Ha Shin Yeop

  Support Role
• 
  Han Go Eun

  Yoon Chae Rim

  Support Role
• 
  Jo Jae Hyun

  Jo Pil Do

  Support Role
• 
  Son Hyun Joo

  Park Ha [Peppermint brother]

  Support Role
• 
  Park In Hwan

  [Su Ha's dad]

  Support Role
• 
  Park Jung Soo

  [Su Ha's mother]

  Support Role
• 
  Oh Mi Yun

  [Seo siblings' aunt]

  Support Role
• 
  Kwon Byung Gil

  [Chief prosecutor]

  Support Role
• 
  Lee Hyo Jung

  Lee Young Ho [Doctor]

  Support Role
• 
  Lee Han Wi

  [Detective]

  Support Role
• 
  Kim Hee Jung

  [Paramedic]

  Support Role
• 
  Lee Ki Yeol

  Ma Cheol Joo [Gang boss]

  Support Role
• 
  Kim Seung Wook

  [Prosecutor's office investigator]

  Support Role
• 
  Yang Eun Yong Support Role
• 
  Song Seo Yeon Support Role
• 
  Kim Seung Min Support Role
• 
  Seo Rin Support Role
• 
  Kim Joo Hyuk Support Role
• 
  Kim Dong Gyun Support Role
• 
  Yoon Gi Won Support Role
• 
  Jo Yun Hee Support Role
• 
  Jo Sun Mook Support Role
• 
  Min Kyung Jin Support Role
• 
  Song Geum Shik Support Role
• 
  Sul Kyung Gu Support Role
• 
  Yoo Hyung Kwan Support Role
• 
  Kim Hye Jung Support Role
• 
  Uhm Soo Jung Support Role
• 
  Ha Seung Ri Support Role
• 
  Lee Seung Hyung Support Role
• 
  Jung Eun Pyo Support Role
• 
  Cho Seong Ha Support Role
• 
  Park Chil Yong Support Role
• 
  Shim Yang Hong Support Role
• 
  Go Mi Young Support Role

Guest Role

• 
  Kim Hyun Jung

  [Herself] (Ep. 1)

  Guest Role

Bit part

• 
  Oh Tae Eun Bit part

Unknown

• 
  Jung Joo Eun Unknown