The film's rep stated on January 29, "Jung Yoo Mi, Yeon Woo Jin, and Song Jae Rim have been confirmed for 'Tunnel 3D'. Crank-In is set to begin shortly," and Dohee's agency rep told Xports News, "It is true that [Dohee] received the casting offer for 'Tunnel'. She is currently reviewing the scenario."
According to the film's production company, Jung Si Yeon, Lee Si Won, Lee Jae Hee, and Son Byung Ho will also star in the film.
'Tunnel' is a 3D horror thriller film that will take viewers through the unusual occurrences that happen when a resort opens at an abandoned coal mine.