Reds (1981), co-written, produced, directed by and starred Warren Beatty.
When principal photography began in August 1979 the original intention was for a 15-to-16-week filming shoot, but it ultimately took one whole year to just shoot the film. The process was slow because it was shot in five different countries and at various points the crew had to wait for snow to fall in Helsinki (and other parts of Finland), which stood in for the Soviet Union, and for rain to stop in Spain.
