A Werewolf Boy

Song Joong-ki

as

Wolf-Boy / Chu...

Park Bo-young

as

Young Sun-yi /...

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...

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 (uncred...

Han Min-hik

as

Thug 2 (uncred...

Chuay Kwong-lak

as

Thug 3 (uncred...

Sung Du-hyung

as

Man in Black S...

Cha Jong-ho

as

Man in Black S...

Seo Dong-soo

as

Army Colonel (...

Jung In-gum

as

(uncredited)

Lee In-ho

as

(uncredited)

Oh Yeong-seok

as

Policeman 2 (u...

Ku Lu-han

as

(uncredited)

Kim Chul-jun

as

Construction W...

Park Young-shik

as

Construction W...

Kim Seung-hun

as

Public Officia...

Koo Kyo-hwan

as

Drunk Man (unc...

Kim Eun-sook

as

Military Chief...

Hong Sung-ki

as

Acupuncturist ...

Hung Hi-kwon

as

Hospital Docto...

Lee Min-woong

as

Dr. Kang's Ass...

Nam Jung-hee

as

Dong-suk's Gra...

Ahn Do-gyu

as

Dong-suk (uncr...

Kim Hae-eun

as

Woman Renting ...

Lee Sung-ju

as

Sun-yi's Son (...

Jang seo-yi

as

Sun-yi's Daugh...

Jo Jae-yun

as

Sun-yi's Grand...

Kim Jong-goo

as

Sun-yi's Fathe...

Shin Yeong-che...

as

Eun-ju's Boyfr...