Watch Blake Lively & Anna Kendrick Teaser Trailer for A SIMPLE FAVOUR

“Everybody has a dark side… Some of us are better at hiding it than others.” Adapted from Darcey Bell’s edge-of-your seat debut novel of the same name the story follows Stephanie (Anna Kendrick), a single mother whose best friend Emily (Blake Lively), a sophisticated PR executive in Manhattan, suddenly disappears without a trace, leaving her son and husband (Henry Golding) with no warning.

Irish release date is September 21.