The Smile Has Left Your Eyes

Composer

• 
  Lim Ha Yong

Director

• 
  Yoo Je Won

Screenwriter

• 
  Song Hye Jin

Main Role

• 
  Seo In Guk

  Kim Moo Young

  Main Role
• 
  Jung So Min

  Yoo Jin Kang

  Main Role
• 
  Park Sung Woong

  Yoo Jin Gook

  Main Role

Support Role

• 
  Seo Eun Soo

  Baek Seung Ah [Jin Kang friend]

  Support Role
• 
  Go Min Si

  Im Yoo Ri [Moo Young's friend]

  Support Role
• 
  Jang Young Nam

  Tak So Jung [Police officer]

  Support Role
• 
  Yoo Chea Myung

  Yang Kyung Mo [Psychiatrist]

  Support Role
• 
  Do Sang Woo

  Jang Woo Sang [Seung Ah's fiancé]

  Support Role
• 
  Kim Ji Hyun

  Jang Se Ran [Conglomerate]

  Support Role
• 
  Kwon Soo Hyun

  Eom Cho Rong

  Support Role
• 
  Lee Hong Bin

  No Hee Joon

  Support Role
• 
  Kim Seo Kyung

  Hwang Gun [Detective]

  Support Role
• 
  Choi Byung Mo

  Lee Kyung Cheol [Detective]

  Support Role
• 
  Park Min Jung

  Hwang Sun Hwa [CEO of Design lux]

  Support Role
• 
  Lee Ji Min

  Im So Yeon [Assistant Manager at Design lux]

  Support Role
• 
  Kim Jung Young

  [Baek Seung Ah's mother]

  Support Role
• 
  Isle Han

  Shin Yoo Jin

  Support Role
• 
  Choi Sung Joon

  CEO Jung Sang Yoon

  Support Role
• 
  Hong Hee Won

  Lee Hae Jin

  Support Role
• 
  Lee Ji Ha

  Nun Lucy

  Support Role
• 
  Han Sa Myung

  Lee Jae Min [Detective]

  Support Role

Guest Role

• 
  Park Hyun Jeong

  [Organist] (Ep. 4)

  Guest Role
• 
  Jung Hae Kyun

  Kim Sang Jin [Yoo Jin Gook's past colleague] (Ep. 8)

  Guest Role
• 
  Im Ji Gyu

  Kang Soon Goo (Ep. 14)

  Guest Role
• 
  Yang Kyung Won

  [Detective] (Ep. 16)

  Guest Role
• 
  Jeon Gook Hwan

  Jang II Geon [Jang’s father] (Ep. 16)

  Guest Role
• 
  Kim Dong Won

  [Jang family's secretary]

  Guest Role
• 
  Kim Yeon Ung

  Kim Moo Yeong [Young]

  Guest Role
• 
  Eom Seo Hyun

  Im Yoo Ri [Young]

  Guest Role
• 
  Yang Ye Na

  Yoo Jin Kang [Young]

  Guest Role
• 
  Kim Esther

  [High School student]

  Guest Role
• 
  Kim So Young

  [Program host]

  Guest Role
• 
  Kim Kyung Il

  Gil Hyeong Ju [Master]

  Guest Role
• 
  Jwa Chae Won Guest Role
• 
  Kim Do Ha

  [Moo Young's colleague]

  Guest Role
• 
  Park Jin Soo

  [Part-time cafe worker]

  Guest Role
• 
  Lee Na Yeon

  [Pediatric ward girl]

  Guest Role
• 
  Seo Sung Jong Guest Role
• 
  Jeon Seung Hun

  [Reporter]

  Guest Role
• 
  Hong Suk Youn

  [Security guard]

  Guest Role
• 
  Song Min Jae

  [Missing child]

  Guest Role

Extras Casting

• 
  Noreen Joyce Guerra

  [Girl on bus]

  Extras Casting

Unknown

• 
  Oh Seung Chan Unknown
• 
  Kim Joong Don Unknown