VIDEO : Director Denis Villeneuve Reveals The Hardest Part Of Making New Sci-Fi Film 'Arrival'

Actress Amy Adams attends the photocall for the movie 'Arrival' at the 73rd Venice Film Festival in Venice, Italy September 1, 2016. Canadian film director Denis Villeneuve said making sci-fi thriller "Arrival", which has premiered in Venice, was the biggest challenge of his career so far because it meant creating a foreign civilization that obeys different kinds of laws. The movie, which also stars Forest Whitaker and Jeremy Renner, is one of 20 U.S.