Trivia: Shrek took more than four years to produce. One of the reasons it took so long was that Chris Farley had been cast as the voice of Shrek, but he died in late 1997 from a drug overdose in the middle of production. His lines had to be re-recorded by Mike Myers.
Trivia: Mike Myers actually does the voice for two characters: Shrek and one of the Three Blind Mice.
Trivia: In the scene where Lord Farquaad is in bed, watch as they pan up to him, you'll see the bear skin rug on his floor is actually the Momma Bear from The Three Bears. Baby bear can actually be seen crying in the huge gathering outside Shrek's cabin.
Trivia: The scene where Fiona impressed Shrek with her loud burp was added to the film courtesy of Cameron Diaz. Diaz gave such a loud belch after drinking some Coke during recording, which gave the movie makers the idea for the gag.
Trivia: When Shrek opens his door and sees all the fairy tale creatures in his swamp, look in the lower right hand corner of the screen and you'll see Pinnochio picking a fight with one of the dwarfs.