10. Citizen Kane "Rosebud!" Perhaps the most well known single word uttered in the history of cinema; the last dying word of a newspaper magnate as he clutches a snow globe, triggering a mystery a reporter seeks to unravel. Those who have seen Citizen Kane can safely nod knowingly upon hearing this word, and it's certainly a line everyone should be familiar with even if they haven't seen the movie. Having regularly topped the best movies of all time lists from countless critics it has long been considered as the most influential film ever made. Writer-director-star Orson Welles crafted a triumph of filmmaking which revolutionised the way a camera can be used while at the same time upending conventional narrative and creating his very own legend. Still, with its labyrinthine plot and black and white cinematography there's a good chance you'll know someone who hasn't actually seen Citizen Kane (or haven't seen it yourself) simply because it's an old, black and white movie. Watch it and see for yourself whether it deserves to be known as one the best movie ever made.