The Guardian has a useful list of the most often misquoted movie lines (or, useful if you want to be annoying at dinner parties. And I do!). At the top of the list? "Luke, I am your father," which is apparently never uttered by Darth Vader! I found the list disappointing* — clearly the misquotes are better lines — and if I've been wrong all these years, frankly, my dears, I don't give a damn.
*Mostly because the writer uses the non-word "impactful".