Diego Fabbri (July 2, 1911 – August 14, 1980) was an Italian playwright whose plays centered on religious (Catholic) themes.
His career as a screenwriter and scriptwriter began with collaborations with directors as Vittorio De Sica, Alessandro Blasetti, and Germs.
He also worked with other film makers such as Roberto Rossellini, Federico Fellini, Paw, Michelangelo Antonioni, René Clair, Luis Buñuel and Fleischer.
Fabbri wrote the screenplay for films like the Family Process (1953), The Liar (1954), Trial of Jesus (1955), Vigil of Arms (1956), Delirium (1957), Sons of Art (1959), Process Karamazov (1960), The Squirrel (1961), At the Table Do Not Talk About Love (1962), The Confidant (1964) and The Event (1967).
His term there was marked by a policy of expansion and inculcating a theater culture throughout the country.