Low Budget Movies That Later Became Massive Blockbusters

My Small, Cheap, Filmed Wedding

The movie only cost $5 million to make, pretty low for the movie business. This film was written and acted by Nia Vardalos.

Fantasia (1940) was originally a short called The Sorcerers Apprentice, but Walt Disney overspent on the score and decided to make it feature length film rather than waste money.
Christopher Mintz-Plasse, who played the character of ‘Fogell/McLovin’ in the coming-of-age indie flick ‘Superbad,’ was only 17 when filming took place. Being a minor at the time, his mother was required to be on the set during the filming of his sex scene.
Jackie Chan voiced the Beast in the Chinese dub of The Beauty And The Beast.
A "Harry Potter" stunt double was paralyzed on the job.