Which of the sentences is written correctly?
A.
The well-known actor Brad Pitt used to work as a janitor before becoming a huge star.
B.
The well-known actor Brad, Pitt, used to work as a janitor before becoming a huge star.
C.
The well-known actor, Brad Pitt, used to work as a janitor before becoming a huge star.
D.
The, well-known actor Brad Pitt, used to work as a janitor before becoming a huge star.