Snowpiercer is a 2013 post-apocalyptic action thriller film based on the French climate fiction graphic novel Le Transperceneige by Jacques Lob, Benjamin Legrand and Jean-Marc Rochette. The film was directed by Bong Joon Ho and written by Bong and Kelly Masterson. An international co-production, the film marks Bong's English-language debut; almost 85% of the film's dialogue is in English.