The Girl on the Train is based on a short story by a Somali author.
Mathieu Cailler ( born June 16 , 1984 ) is a French-American writer of poetry and prose . The Girl on the Train is a 2016 American mystery thriller drama film directed by Tate Taylor and written by Erin Cressida Wilson , based on Paula Hawkins ' 2015 debut novel of the same name .