Jamie Lee Curtis dressed as mom Janet Leigh in 'Psycho' for 'Halloween Kills' premiere - CNN

But now because of the 'Hitchcock' movie, we know it was pale blue."

She added the shower curtain, she said, so people wouldn't think she had just dressed as a 1950s housewife.

It's not the first time the actress has paid tribute to her famous mother's equally famous horror movie role.

In 2015, Curtis recreated the "Psycho" shower scene, in black and white like the original, as part of her role as Wallace University Dean Cathy Munsch on Ryan Murphy's horror-comedy TV series "Scream Queens."