TCM's Ben Mankiewicz has a cameo in Mank, David Fincher's Netflix movie about his grandfather Herman J. Mankiewicz

Indiewire

The 53-year-old Turner Classic Movies host never knew his grandfather, who died years before he was born. But Ben Mankiewicz says he's known about the script David Fincher's father Jack Fincher wrote for Mank for 10 to 15 years. In fact, Ben Mankiewicz learned about the script from his cousin John Mankiewicz, who worked with David Fincher as a producer on House of Cards. In Mank, Ben Mankiewicz plays the radio voice who announces that Orson Welles and Herman J. Mankiewicz have won an Oscar for their Citizen Kane screenplay.