When it comes to Star Wars films, ad-libbing would seem strictly verboten. Even apart from the fact that it's a multibillion-dollar franchise that needs to appeal to multiple demographics, how do you improvise dialogue in a science fiction setting without common frames of reference?
But that's the thing about Star Wars: It's not about the spaceships or the droids or the whimsical Force (though all those things are quite nice); it's about the characters we love and hate, and how they relate to each other. With that in mind, there's plenty of room for improvised lines in Star Wars, ad-libs thrown in on the spur of the moment, and unscripted jokes or winks that emphasize the humanity of these aliens in a galaxy far, far away.
These are the unscripted Star Wars scenes that rank among the best moments in the franchise.