Sydney Sweeney and Amanda Seyfried bring a smash-hit thriller novel to life, about a young domestic servant whose employers hold a horrible secret.

Stymied by her criminal record and reduced to living out of her car, Millie (Sweeney) jumps at the chance to work for a wealthy young family on Long Island. Living on site at their big, isolated home, she quickly bonds with her employers and the gardener despite odd behaviour from the mother, Nina (Seyfried) – but as she discovers more about the household’s difficult past, she becomes tied to it in ways that could be fatal. Working from an eBook that became a viral phenomenon, director Paul Feig (Bridesmaids, A Simple Favour) preserves its simple, irresistible narrative drive on film, while Sweeney and Seyfried give it human substance as the sharp, troubled protagonist and smooth, even-more-troubled trophy wife.