Taking a page from an old WILLIAM CASTLE horror film, a mystery Tweeter has been menacing KATE GOSSELIN with threatening messages!

Using a profile photo depicting the bible verse John 8:32, the ominous stalker has been sending the former Kate Plus 8 star increasingly creepy tweets.

The messages began on April 26 with a countdown of when the antagonist will expose Kate’s supposed "immoral ways." “56 more days Kate!! It's not too late to change your ways. Follow us for updates!”

 The latest creepy comment on May 1 pointed out that time is running out, “I know what you did @Kateplusmy8, and in 51 days so will the world,” and then tagged #radar_online as well to alert the internet digital news world,  RadarOnline.com reported.

In the New Testament of the Bible, verse John 8:32 reads: “Then you will know the truth, and the truth will set you free,” supporting fears the mystery stalker plans to expose Kate’s deepest, darkest secrets on the judgment day of June 21.

Kate, the mother-of-eight children, is embroiled in a legal battle with ex-hubby Jon Gosselin who owes $3557.06 in child support payments.

Kate seemed blindsided by the fact that Jon was going to go back to court for non-payment of child support after a Twitter follower alerted her last month.

For those unfamiliar with horror producer William Castle classic “I Saw What You Did” the teen age thrill flick centers around two girls who prank call strangers who stumble on a murder. Their gag consisted of saying into the phone “I saw what you did and I KNOW who you are”.