George Lucas, who conceived of the name Darth Vader, described it as a variant of the phrase "Dark Father"

Han Solo's famous line "I know" in response to Leia's "I love you" was an ad lib by Harrison Form. The line in the script was "I love you, too."

According to Mark Hamill, 20th Century Fox executives were concerned that Chewbacca was naked and suggested that he wear pants

In the original draft of Star Wars Episode IV, Luke Skywalker's character was an 18-year-old girl

The original title of Star Wars Episode IV was "Adventures of Luke Starkiller"