During the filming of 'Braveheart', Mel Gibson had to finance part of the movie himself due to budget constraints.
For 'Schindler's List', Steven Spielberg refused to take a salary, feeling it would be 'blood money'.
In 'Titanic', the famous scene where Jack sketches Rose was drawn by director James Cameron himself.
During 'The King's Speech' filming, the crew had to deal with a pesky pigeon that kept interrupting scenes.
In 'Saving Private Ryan', the actors went through a grueling boot camp to prepare for their roles as soldiers.
While filming 'Lincoln', Daniel Day-Lewis stayed in character as President Lincoln even off-camera to maintain the role.