Original: The Matrix is a  science fiction-adventure film written and directed by Larry and Andy Wachowski and starring Keanu Reeves, Laurence Fishburne, Carrie-Anne Moss, Joe Pantoliano, and Hugo Weaving.
Simplified: The main actors in the movie are Keanu Reeves, Laurence Fishburne, Carrie-Anne Moss, and Hugo Weaving.