Watts, a veteran of the genre despite never quite being a scream queen, is delightfully disturbing in a role that requires her to mask her character’s true nature as well as her face.

With gripping performances from the Crovetti brothers to keep us intrigued enough to keep us watching until the end, Goodnight Mommy still manages to unmask some thrills — even if the strength of its source material ties it down.

Kyle Warren’s screenplay is potent enough to generate several moments of suspense, and Watts, an exceptional actor sidelined too often by poor choices, is not the problem here. That would be the decision to jettison the children’s most creative cruelties — and consequently much of the movie’s tension — and a director, Matt Sobel, who’s determined to steer the audience toward a specific interpretation of events.

It is still a well-made film, with fantastic acting and a beautiful, modern house set out in the middle of nowhere, but it is not the shocker that it was when it was new. Knowing the twist, and the minor changes that were made for an American audience really soften the movie. If you enjoyed the original, the American remake would be perfect fodder for your parents.

Matt Sobel’s overhaul tones down the cruelty and eliminates the more grotesque touches, resulting in a chamber drama that never gets under the skin.