Thrill Fest: Colony Cast and Crew

Main Cast: Gianna Jun as Kwon Se-jeong

Main Cast: Koo Kyo-hwan as Seo Young-cheol

Main Cast: Ji Chang-wook as Choi Hyun-seok

Supporting Cast: Kim Shin-rock as Choi Hyun-hee

Supporting Cast: Shin Hyun-been as Kong Seol-hee

Supporting Cast: Go Soo as Han Kyu-seong

Supporting Cast: Lee Jung-ok as Lee Bong-seok

Supporting Cast: Kim Jong-tae as Kang Woo-cheol

Supporting Cast: Hwang Jae-yeol as Citizen

Supporting Cast: 이담희 as Lee So-eun

Supporting Cast: Chae Seo-eun as Bully Girl

Supporting Cast: Kim Sung as Bully Boy

Supporting Cast: Kim Jae-rok as Old Man

Supporting Cast: Oh Kyung-Hwa as Sushi Restaurant Employee

Supporting Cast: Choi Gwang-il as Minister

Supporting Cast: Kim Hyeong-mook as Chief of Staff

Supporting Cast: Hong Seok-bin as Chief Police

Supporting Cast: Lee Hyun-kyun as Ju Cheol-min

Supporting Cast: Lee Kang-wook as Lee Hynn-min

Supporting Cast: Jeong Ae-hwa as Seol-hee's Mother

Supporting Cast: Kim Min-chae as Han Ji-hye

Supporting Cast: Kim Seung-hoon as Seo Gyeong-seok

Supporting Cast: Choi Woo-jin as Young Seo Young-cheol

Supporting Cast: Seo Suk-kyu as Reporter Kim Seong-il

Supporting Cast: Lee Dong-kyu as News Anchor 1

Supporting Cast: Ha Seung-yeon as Sign Language Interpreter

Supporting Cast: Agung Bagus as Infected (uncredited)

Director: Yeon Sang-ho

Writer: Yeon Sang-ho

Writer: Choi Gyu-seok

Film Producer: Kim Yeon-ho

Film Producer: Yang Yoo-min

Film Producer: Sung Jun-ho