Wilson Had Dialogue
Hanks has credited the prop/character of Wilson as one of Chuck's only means of holding onto his sanity while on the island. However, because Wilson is an inanimate object, the writers had to get creative in order to find a way for Chuck to express his inner thoughts. So, during filming, extras would speak "Wilson's" lines to Hanks and have him respond so the discourse felt natural. Wilson turned into a sort of "cranky old man" character through Chuck's inner thoughts.