Ryu Jun-yeol as Muruk

Kim Woo-bin as Guard / Thunder

Kim Tae-ri as Ean

So Ji-sub as Moon Do-seok

Yum Jung-ah as Madam Black

Jo Woo-jin as Mr. Blue

Kim Eui-sung as Jajang / Doctor

Lee Hanee as Min Gaelin

Shin Jung-keun as Right Paw

Lee Si-hoon as Left Paw

Kim Dae-myung as Thunder (voice)

Choi Yu-ri as Young Ean

Kim Ki-cheon as Gae-ttong

Yoon Byung-hee as Shaman Dosa / Alien Robot (voice)

Ji Gun-woo as Murderer

Yoon Kyung-ho as Sam-sik

Ok Ja-yeon as Fellow Doctor

Lee Hyun-gul as Shaman Dosa 2

Kim Hae-sook as Old Lady

You Chea-myung as Master Hyun

Jeon Yeo-been as Hong Eon-nyeon

Kim Min-seo as Min-sun

Lee Sun-hee as Inn Owner

Baek Hyun-joo as Principal

Choi Kwang-je as Choi

Shim Dal-gi as Bride

Oh Chae-eun as Gisaeng

Jang Jun-whee as Hyeong-bang

Lee Dong-yong as Ge-gan

Kim Jung-han as Fisher

Kim Chan-hyung as Thief

Lee Dong-hee as Steward

Song Ji-hyuk as Haava

Kim Tae-eung as Doo-sik-i

Kim Sun-hyuk as Police