Star Wars bloopers found: Harrison Ford and Carrie Fisher laugh as they mess up their lines

Funny clips from the set of George Lucas's A New Hope

The Stormtroopers have a bit of trouble negotiating a doorway (YouTube/Neil Bowyer/Lucasfilm)

Star Wars fans worldwide have been treated to a newly discovered blooper real from the set of 1977's A New Hope.

In the clip, which was originally broadcast at San Diego Comic Con earlier this year, Harrison Ford, Mark Hamill and Carrie Fisher are all seen breaking character and having fun in front of the cameras on the George Lucas film.

The reel, which has already earned more than 1.5 million YouTube views, was discovered by Lucasfilm editor and author JW Rinzler.

His research has been poured into a new book, titled The Making of Star Wars: The Definitive Story Behind the Original Film.

In the video, an "anti-gravity" land speeder tears across the desert sands, only for its protective covering to come off, revealing a far less high-tech set of conventional wheels.

Another scene shows an alien pointing into the chest of a friend, only to find his hand completely mangled.

Carrie Fisher (Princess Leia) laughs as Peter Cushing (Grand Moff Tarkin) forgets his lines, and Stormtroopers reveal themselves to be a less-than-formidable foe by struggling to negotiate a narrow doorway.

Harrison Ford (Han Solo) chews on a piece of the Millennium Falcon set as he mixes up his words, but Mark Hamill (Luke Skywalker) seems more concerned by getting the pronunciation right.

"How do you pronounce supernova?" he asks someone off-screen. "What's the inflection? Is it supernova or supernova?"