The Girl on the Train is a 2016 American mystery psychological thriller film directed by Tate Taylor and written by Erin Cressida Wilson, based on the popular 2015 debut novel of the same name by British author Paula Hawkins. The film stars Emily Blunt, Rebecca Ferguson, Haley Bennett, Justin Theroux, Luke Evans, Allison Janney, Édgar Ramírez, and Lisa Kudrow. The film follows an alcoholic divorcée who becomes involved in a missing person investigation.

Principal photography began on November 4, 2015, in New York City. Produced by Marc Platt and DreamWorks Pictures, The Girl on the Train was the first film produced by DreamWorks Pictures to be distributed by Universal Pictures as part of DreamWorks' new distribution deal via the company Amblin Partners.

The Girl on the Train premiered in London on September 20, 2016, before it was theatrically released in the United States on October 7, 2016. The film was a box office success, grossing $173 million worldwide. It received mixed reviews, but Blunt's performance received critical acclaim, as well as nominations for Outstanding Performance by a Female Actor in a Leading Role at the 23rd Screen Actors Guild Awards and the BAFTA Award for Best Actress in a Leading Role at the 70th British Academy Film Awards. A Hindi remake was released in 2021, with Bollywood actress Parineeti Chopra in the starring role.