늑대소년

Song Joong-ki

as Wolf-Boy / Chul-soo

Park Bo-young

as Young Sun-yi / Eun-ju

Yoo Yeon-seok

as Ji-tae

Lee Young-lan

as Sun-yi

Jang Young-nam

as Sun-yi's Mother

Kim Hyang-gi

as Sun-ja

Yoo Seung-mok

as Professor Kang Tae-shik

Shin Bi

as Dong-mi

Woo Jung-kook

as Mr. Jung

Goo Bon-im

as Mrs. Jung

Lee Jun-hyeok

as Policeman

Soel Oh-shin

as Thug 1 (uncredited)

Han Min-hik

as Thug 2 (uncredited)

Chuay Kwong-lak

as Thug 3 (uncredited)

Sung Du-hyung

as Man in Black Suit 1 (uncredited)

Cha Jong-ho

as Man in Black Suit 2 (uncredited)

Seo Dong-soo

as Army Colonel (uncredited)

Jung In-gum

as (uncredited)

Lee In-ho

as (uncredited)

Oh Yeong-seok

as Policeman 2 (uncredited)

Ku Lu-han

as (uncredited)

Kim Chul-jun

as Construction Worker at Market 1 (uncredited)

Park Young-shik

as Construction Worker at Market 2 (uncredited)

Kim Seung-hun

as Public Official (uncredited)

Koo Kyo-hwan

as Drunk Man (uncredited)

Kim Eun-sook

as Military Chief (uncredited)

Hong Sung-ki

as Acupuncturist (uncredited)

Hung Hi-kwon

as Hospital Doctor (uncredited)

Lee Min-woong

as Dr. Kang's Assistant (uncredited)

Nam Jung-hee

as Dong-suk's Grandmother (uncredited)

Ahn Do-gyu

as Dong-suk (uncredited)

Kim Hae-eun

as Woman Renting Mr. Jung's Room (uncredited)

Lee Sung-ju

as Sun-yi's Son (uncredited)

Jang seo-yi

as Sun-yi's Daughter-in-Law (uncredited)

Jo Jae-yun

as Sun-yi's Grandson (uncredited)

Kim Jong-goo

as Sun-yi's Father (uncredited)

Shin Yeong-cheol

as Eun-ju's Boyfriend (uncredited)