Released on May 25th in 1977, the impact 'Star Wars' - later retitled, 'Star Wars: Episode IV - A New Hope' - had on the movie industry is still being felt to this day.

George Lucas turned what was essentially a 'Flash Gordon' rip-off into a billion-dollar franchise and, in the process, solidified the idea of the summer blockbuster in cinemagoers across the globe.

Starring relative unknowns Mark Hamill, Carrie Fisher and Harrison Ford, as well as respected British actors such as Alec Guinness and Peter Cushing, 'A New Hope' became the highest-grossing movie of all time until 1982's 'ET: The Extra-Terrestrial' toppled it.

For this Ultimate Quiz, we've come up with 15 reasonably difficult questions to test your memory on. As always, no checking Google, or Wikipedia (or even Wookiepedia) for the answers.

Good luck, and may the-- nope, too obvious. Not doing it. Sorry.