Given an article, identify the main actors and summarize their roles.
In the highly acclaimed film The Godfather, Marlon Brando plays the head of a criminal organization, Don Vito Corleone. His son, Michael Corleone, is a returning World War II hero who initially wants nothing to do with the family business.
Marlon Brando portrays Don Vito Corleone, the head of a criminal organization, in the highly acclaimed film The Godfather. His son, Michael Corleone, is a World War II veteran who is initially turned off to the family business and longs for a life away from criminal activity. However, Michael eventually takes over the family business following his father's death as he is the only person who can protect it from the hostile environment.