Goofs:
Revealing mistakes: Nearly all of the Spanish names are pronounced more or less correctly, but Miguel (correct pronunciation: Mee-gell) is mispronounced "Mee-gwell" in the film. (more)

Trivia:
The original creators of the show--Dale Wasserman (author), Albert Marre (director) and Mitch Leigh (composer)--were all originally hired by United Artists to work on the film, but UA was unhappy with the screen tests they made, so they were all dismissed and director Peter Glenville was called in. But when UA discovered that he planned to eliminate most of the songs, he was also dismissed. UA then rehired Wasserman, and added Saul Chaplin and producer-director Arthur Hiller, who retained most of the musical's score for the film. However, the "look" of the film, according to Chaplin, had already been largely determined by the previous creative teams hired to make the movie. It has always remained unclear who cast the usually non-singing actors (such as Sophia Loren, who sang in the film, and Peter O'Toole, whose singing was dubbed), and which creative team cast the singing actors (Julie Gregg, Gino Conforti, James Coco and several of the "muleteers"). (more)

Filming Locations:
Dino De Laurentiis Cinematografica Studios, Rome, Lazio, Italy (more)

Quotes:
The Duke: I invent false information about a country and sell it to others stupid enough to believe it.
Miguel de Cervantes: Seems a sound proposition. What brought you here?
The Duke: A lapse of judgment. I told the truth.
(more)

Awards:
Nominated for Oscar. Another 1 win & 2 nominations (more)