Back to peopleKelly MastersonKnown forWritingAge76 yearsPlace of birth United StatesBiographyLife and careerKelly Masterson is an American playwright and screenwriter best known for writing Before the Devil Knows You're Dead and adapting the screenplay for Bong Joon-ho's Snowpiercer.Filmography3 filmsAll3Crew3Good People2014WriterSnowpiercer2013ScreenplayBefore the Devil Knows You're Dead2007Writer
