Song Kang-ho

Sang-hyun

송강호

Gang Dong-won

Dong-soo

강동원

Bae Doo-na

Su-jin

배두나

IU

So-young

Lee Joo-young

Detective Lee

이주영

Lim Seung-soo

Hae-jin

임승수

Park Ji-yong

Woo-sung

박지용

Kim Sun-young

Orphanage Director's Wife

김선영

Lee Moo-saeng

Seon-ho

이무생

Lee Dong-hwi

Mr. Song

이동휘

Kim Sae-byuk

Mr. Song's Wife

김새벽

백현진

Detective Choi

오희준

Detective Choi's Subordinate

Ryu Kyung-soo

Tae-ho

류경수

종호

Young-gil

성유빈

Young-min

Park Kang-seop

Si-woo

박강섭

Kim Keum-soon

Ms. Park

김금순

Kang Gil-woo

Mr. Im

강길우

김예은

Mr. Im's Wife

정지우

Mr. Yoon's Wife

Ryu Ji-an

Yun-ah

류지안

윤슬

Babybox Staff 1

장혜민

Babybox Staff 2

정종열

Babybox Pastor

정아영

Jung-ae

이예서

Ye-seo

최희진

Mi-sook

이도군

Police Officer

김도연

Seon-ah

최효상

Doctor

강민지

Nurse 1

이가경

Nurse 2

양권석

Taxi Driver

윤상학

Granny in Front of the Laundromat

Lee Doo-seok

Gyu-seok

이도규

4-Year-Old Woo-sung

이유주

Little Girl at So-young's House 1

강규린

Little Girl at So-young's House 2

김주은

Little Girl at So-young's House 3

임가영

19-Year-Old Girl at So-young's House

우성민

Orphanage Kid 1

최윤우

Orphanage Kid 2

정혁

Teenager 1

이동현

Teenager 2

신채린

Young Yun-ah

나경철

News Anchor (voice)

Song Sae-byuk

Orphanage Director

송새벽

Park Hae-joon

Mr. Yoon

박해준