Eddie Kaye Thomas — Knife-Wielding Chick Was ONE NIGHT STAND Gone Bad

Exclusive 0418_eddie_kaye_01Y”know what they say about stranger danger — the chick who pulled a knife on Eddie Kaye Thomas had just met the “American Pie” star less than 24 hours earlier … our sources has learned.

As we first reported … SWAT responded to Thomas” house Wednesday evening after Thomas called 911 … and remained in a standoff with the woman for a couple hours … before forcing her out with tear gas.

She was taken into custody, checked out at a hospital, and then booked for felony vandalism.

But here”s the best part — according to law enforcement sources Eddie met the chick the night before at Mel”s Diner, and brought her back to his place.

Typical one night stand, we”re guessing … until Wednesday afternoon when Eddie says they got into an argument, and she pulled the knife.

During the standoff, we”re told the woman smashed up a phone, a guitar … and generally trashed Eddie”s house before cops smoked her out.

Eddie”s rep hasn”t gotten back to us yet.