Trivia: Production was shut down for a year, to give Tom Hanks enough time to lose weight and grow out his "castaway" beard. During that time, director Robert Zemeckis used the same crew members to help film "What Lies Beneath."
Trivia: When the shots on the island were finished, the sound had to be completely redone, as the surf was too loud.
Trivia: Screenwriter William Broyles took survival courses and during that time a Wilson brand soccer ball washed up on shore - the inspiration for Wilson in the movie. The director Bob Zemeckis states in the feature voiceover that they changed it to a volley ball because "a soccer ball has all those black spots on it'.
Answer: Cast Away was filmed on an island called Monuriki. It's part of a group of islands called the Mamanuca Islands, in Fiji.