kinship 
The original concept model of the Millennium Falcon was long and cylindrical—very unlike the flat design we know now. The model makers complained the design was too similar to the spacecraft from the 1970s British TV series Space: 1999, so Lucas told them to create something completely different that looked like a flying hamburger and sailed like a sunfish.
A variation of the Falcon prototype did, however, end up in the movie. It’s the Rebel Blockade Runner seen fleeing the Imperial Star Destroyer in the opening scene.
