“It was so important to me,” she told The List inan exclusive interview.

“It was important for me to keep checking in on them.”

An unnerving game of psychological and ultimately physical torment between the boys and their mother begins to escalate.

Naomi Watts smiling at G’Day USA Gala

“100%,” she said.

“I had multiple conversations with their mom, and I knew that they were pros coming in.

They’d done quite a large amount of work already.

Mother and boys arguing in Goodnight Mommy

“Goodnight Mommy” is streaming now on Prime Video.