The Imperial officer's uniforms were patterned after the uniforms of Nazi officers to add to their "villainous" image.

Harrison Ford wasn't an original candidate to play Han Solo. He was originally brought in simply to feed lines to the other auditioners. After watching Ford, George Lucas realized he was the perfect Han.

Luke's line "I can't see a thing in this helmet" was not scripted. Mark Hamill said this to Harrison Ford when he thought the cameras had stopped rolling. But, the filmmakers decided to leave the line in.

When George Lucas was mixing the American Graffiti soundtrack, he numbered the reels of film starting with an R and numbered the dialog starting with a D. Sound designer Walter Murch asked George for Reel 2, Dialog 2 by saying "R2D2". George liked the way that sounded so much he integrated that into Star Wars.

Luke says "Prisoner transfer from block 1138" on the Death Star - a reference to George Lucas' film THX-1138.

Mark Hamill annoyed Alec Guiness so much on set because his youth and excitement that Alec paid him a dollar to go away.

The scene in which Luke and Leia swing across a shaft in the Death Star was filmed in one take. The stunt itself was performed by Mark Hamill and Carrie Fisher.

In the bar on Tattooine (where Luke and Obi-Wan meet Han Solo), you see lots of aliens at the bar. Look carefully in the background of these shots, and you'll see a NASA astronaut in full space walk gear (helmet etc) walking across the back of the shot, complete with American flag on his arm. It's quite obvious once you know where to look.

James Earl Jones' name did not originally appear in the ending credits. At the time of the film's release, Jones felt he hadn't done enough for the film to deserve a credit. His name was added for the film's re-release.

The film's screen tests were spoofed in a 1997 episode of "Saturday Night Live," which included Kevin Spacey playing Christopher Walken auditioning for the role of Han Solo. Walken really was considered for that role before Harrison Ford was chosen. Spacey also played Walter Matthau auditioning for Obi-Wan Kenobi and Jack Lemmon auditioning for Chewbacca.

Denis Lawson, who plays Wedge Antilles, is the uncle of Ewan McGregor, who plays Obi-Wan Kenobi in the prequels.

Billy Dee Williams, who later played Lando Calrissian in "The Empire Strikes Back" and "Return of the Jedi," auditioned for the role of Han Solo.

The name of the planet Tatooine came from the town of Tataouine in Tunisia where the movie was filmed.

"Vader" is Dutch for "father."

During Han's conversation with Greedo, the line "Even I get boarded sometimes - do you think I had a choice?" was lifted from his conversation with Jabba that didn't make it into the original release. If you pay attention you'll notice that when he says that line the camera is on his hand cocking his gun, not on his face. When the Jabba scene was put into the Special Edition they left the line in both scenes, which is why the Jabba scene seems a bit repetitive.

According to the documentary "Empire of Dreams," as well as interviews on the "Revenge of the Sith" DVD, George Lucas originally wrote the "Star Wars" trilogy as one long serial titled The Tragedy of Darth Vader, which ran about 200 pages. He then broke it into three separate stories, and focused solely on the first part, which became "Star Wars."

George Lucas decided to release "Star Wars" in May 1977 instead of the start of the summer movie season (in the 1970s, it was a new concept as the result of the success of "Jaws" in 1975) in June because he wanted kids still in school to talk about it so as to spread word-of-mouth.

C3PO was named after a post office which is located at reference C3 on a map of Lucas' hometown. R2-D2 is an abbreviation of 'Reel Two, Dialog Two'.

The heavy rifle used by Chewie in the Death Star is a German WW2 MG 34.

The first time Chewie gets into the cockpit of the Millennium Falcon, he hits his head on a small set of dice. They aren't seen in subsequent shots, nor are they seen in the rest of the trilogy.