The trailer, which first debuted at CinemaCon earlier this month, shows Blunt’s Rachel as she becomes swept up in a mystery involving her ex-husband (Justin Theroux)’s missing nanny.
Rachel is lonely, alcoholic divorcée, whose train passed her old home — where her ex-husband and his new wife live — every day. She begins to spy on a couple a few houses down, played by Luke Evans and Haley Bennett. Once a mysterious disappearance occurs, Rachel gets more and more involved with their lives.
The trailer was backed by a soundtrack of Kanye West’s “Heartless.” Laura Prepon, Rebecca Ferguson, Edgar Ramirez, Allison Janney and Lisa Kudrow also star.
“The Girl on the Train,” adapted from Paula Hawkins’ best-seller and directed by Tate Taylor, hits theaters on Oct. 7.