Louis Winthorpe III is a fictional character from the 1983 comedy film Trading Places. He is portrayed by actor Dan Aykroyd and is depicted as a wealthy and privileged stockbroker living in Philadelphia. His life takes a dramatic turn when he becomes the subject of a bet between two wealthy men. In the film, Louis is forced to adapt to a life of poverty after being framed for a crime he did not commit. This experience challenges his views on wealth and class, ultimately leading to a humorous and insightful exploration of social issues.