Here’s an embarrassing history lesson for Rep. Lauren Boebert … as she tries to grill director Oliver Stone about something President Trump‘s ally Roger Stone actually did!

The Congresswoman from Colorado made the mix-up Tuesday during a congressional hearing about President John F. Kennedy‘s assassination — confusing Oliver’s Oscar winning film “JFK” with Roger’s theory on the killing.

Check out the clip … Lauren asks Oliver about a book he wrote accusing Lyndon B. Johnson of being involved in JFK’s assassination.

Problem is … Oliver wrote no such book. He directed the conspiracy-based movie, of course, but Roger is the one who authored the New York Times bestseller, “The Man Who Killed Kennedy: The Case Against LBJ,” which Lauren is referencing.

Oliver seems confused at first before nicely answering the question … explaining how his movie amplifies conspiracy theories around LBJ’s alleged involvement in a cover-up after the assassination.

The director was on Capitol Hill as part of his call for Congress to reopen the investigation into the JFK assassination … this after the feds finally released a mountain of JFK assassination files.

Lauren’s ultimately corrected by journalist Jefferson Morley … and she apologizes for misinterpreting.