From Wikipedia, the free encyclopedia. Joseph Leo Mankiewicz (11 February 1909 – 5 February 1993) was an American film director, screenwriter, and producer. Mankiewicz had a long Hollywood career and is best known as the writer-director of the Oscar-winning All About Eve (1950). He was brother to screenwriter and drama critic Herman J. Mankiewicz who also won an Oscar for co-writing Citizen Kane (1941). Description above from the Wikipedia article Joseph L. Mankiewicz, licensed under CC-BY-SA, full list of contributors on Wikipedia.