In addition to writing screenplays, during the period from 1916 to 1919, Diamant-Berger also published and edited a film magazine and books about the movies.

In 1918, he was hired by Pathé and sent to the United States to help set up the company's film laboratory at Fort Lee, New Jersey.

His French language film version of the same title, Clair de lune (1932), starred Claude Dauphin and Blanche Montel.

Among his notable sound films was a remake, Les Trois Mousquetaires (1932), a six-hour epic about the three musketeers for which he wrote the screen adaptation and used much of the same cast from his 1921 silent version.

During the 1960s, Diamant-Berger devoted himself exclusively to producing, making several successful films, which includes La Belle Américaine (1961), Heaven Sent (1963) and The Counterfeit Constable (1964).