Jessica Chastain is shooting down Kurt Busch's conspiracy theory about his ex-girlfriend -- claiming her character in "Zero Dark Thirty" was ABSOLUTELY NOT based on Patricia Driscoll.
Remember, during their 2015 domestic violence case ... Busch testified that he believed Driscoll was a trained assassin for the U.S. government ... and that she had claimed Maya from "ZD30" was partially based on her.
So, when we got Jessica Chastain out at Baltaire restaurant in L.A. last night -- we had to ask her to set the record straight once and for all.