The iconic pairing of C-3PO, the fussy protocol droid, and R2-D2, the mischievous astromech droid, is arguably the heart of the "Star Wars" franchise. Ironically enough, the two forever-squabbling droids brought warmth, humanity, and humor to the epic space opera set a long time ago in a galaxy far, far away. But did you know that the two men playing this iconic pair, while appearing to be inseparable in the films, never saw eye-to-eye, off-screen? Over the years, stories about a mutual dislike between the two actors, Anthony Daniels and Kenny Baker, have emerged. Here's why Star Wars' most famous droids couldn't get along.