What was Jack Nicholson’s first job in the movies? July 8, 2020February 9, 2012 by Pamela Landy Jack Nicholson’s first job in the movies was as an office boy in MGM’s cartoon department. Related Answers What was Ronald Reagan’s first broadcasting job? What Roger Corman produced horror movies featured both Jack Nicholson and Boris Karloff? What was future mayor of New York City Fiorello La Guardia’s job at Ellis Island? What is the name of the Devil as played by Jack Nicholson in The Witches of Eastwick (1987)? Who plays the young Jack Nicholson in Batman (1989)? How did Jack Kerouac die?