Guglielmo Garroni

 is an Italian filmmaker who is sometimes credited under the name William Garroni. He began his career as a camera operator on such films as Mad About Opera, 100 Little Mothers and Times Gone By. His only work in the horror genre was a co-producer on the 1980 Dario Argento giallo film Inferno, the second part of a thematically-similar three movie film arc.