Lando and the Millennium Falcon were originally scripted to perish in the Death Star explosion. While this scene was removed, it is referenced when Han tells Leia he has a funny feeling he isn't going to see the Falcon again.

When they were filming the scenes on Endor, Peter Mayhew was told to stay close to the set so no one would mistake him for Big Foot and attempt to shoot him.

The Ewoks' language is a mixture of Tibetan, Nepalese and Mongol.

When Oola the dancing girl (with those two things growing out of the back of her head) is trying to get away from Jabba, she briefly falls out of the top of her costume. It isn't as visible in the letterbox version, but quite visible in the regular version.

In the new box set of the three original films, they have changed the ending in RotJ to correspond better with the ending in Revenge of the Sith. When Luke sees his father as the Anakin Skywalker spirit, in the final scene at the celebration, it is young Hayden Christensen as Anakin's spirit instead of older Sebastian Shaw, who is the spirit in the original version.

Sound designer Ben Burtt makes an uncredited cameo as the Imperial officer in the bunker who shouts "Freeze!" and is subsequently knocked into the generator room by a thrown satchel.

The funeral pyre scene wasn't in the original script.

Notice when Luke is hiding in the shadows from Darth Vader his face is half shadowed, to represent the decision Luke has to make: one side is light, on the other, dark.

When filming ROTJ, Lucas didn't want anyone to find out that they were shooting the third Star Wars movie, because pandemonium could break out. So when someone asked the crew what they were filming, they said "Blue Harvest". All of the crew had shirts and hats that said Blue Harvest on them. The fictitious film's tagline was "Horror beyond imagination."

There was a rumour that the Lucas crew ran out of space ships in the final battle and threw a sneaker in and used it as a space ship. In the final battle, there is a space ship that looks exactly like the sole of the sneaker.

Most people today know what an Ewok is, despite the fact that the word is never actually spoken in the film.

On Endor when Leia is shot by a Stormtrooper she falls over and Han turns around and grabs her left breast. Carrie Fisher smiles slightly before the shot changes.

Luke Skywalker has an AM/FM-cassette deck mounted in the cockpit of his X-Wing fighter. It can be seen as he's flying away from Tatooine after destroying Jabba's barge, in the shot just before he says "That's right, Artoo, we're going to the Dagobah system."

When George Lucas first wrote Star Wars, he was going to have Wookies in Endor but he thought that the movie was going to be so unpopular the he would never release "Return Of The Jedi," so he put Chewbacca in "Star Wars" and the Ewoks in "Return of the Jedi."

The scene where Vader lifts the Emperor and throws him down the shaft, watch it frame by frame and you can see X-Rays of Darth Vader.

Ken Ralston, the man who was pretty much in charge of the space battle, put a number of interesting objects in the background. He sometimes used a wad of gum as a far-away shot of a Mon Cal star cruiser, and there is also a sneaker and a yogurt cup floating around.

The 2 four-note horn blasts (short-short-short-long, call-and-reply) used by the Ewoks to signal their attack to rescue Han and the rebels from the imperials on Endor is the same clarion call used by the Hebrews to signal their exit from Egypt in "The Ten Commandments".

The alien language spoken by Lando's co-pilot on the Falcon contains elements of Kenyan, and one line literally translates as, "A thousand herds of elephants are standing on my foot."

This film and the first film (New Hope) were released on the same day, exactly six years apart.

When the A-Wing is going to hit the Death Star, it's visibly an A-Wing but when it hits it they used a model car - you can see the wheels and the axle.