Ennio Guarnieri (Rome, 12 October 1930) is an Italian cinematographer.He has been regular contributor to the films of Mauro Bolognini and Franco Zeffirelli, and has worked on many occasions with Vittorio De Sica, Marco Ferreri and Lina Wertmüller.Born in Rome, Guarnieri abandoned his studies and worked as an assistant cinematographer of Anchise Brizzi from 1949 to 1956. He debuted as director of photography in 1962 with I giorni contati by Elio Petri.