A Werewolf Boy

Jo Sung-hee

Director

Song Joong-ki

Cheol-soo (wolf-boy)

Park Bo-young

Younger Sun-yi

Park Bo-young

Eun-ju

Yeong-ran Lee

Older Sun-yi

Jang Young-Nam

Sun-yi's Mom

Yoo Yeon-Seok

Ji-tae

Hyang-gi Kim

Sun-ja

Seung-mok Yoo

Professor Kang Tae-shik

Seo Dong-soo

Army Colonel

Woo Jung

Mr. Jung

Jung-Hee Nam

Dong-suk's grandmother

Bon-im Goo

Mrs. Jung

Ahn Do-Gyoo

Dong-suk

Bi Shin

Dong-mi

Lee Joon-hyuk

Policeman 1

Yeong-Seok Oh

Policeman 2

Hae-eun Kim

Woman Renting Mr. Jung's Room

Minwoong Lee

Dr. Kang's Assistant

Do-Hyun Sung

Man in Black Suit 1

Jo Sung-hee

Writer