For the filming of the epic battle scenes, the producers hired 65 physicians, dressed them as soldiers and scattered them throughout the location to take care of any extras or stuntmen who might get injured during filming of the scenes.
Audrey Hepburn's salary of $350,000 for the film was the highest salary an actress had ever received to date. When notified of her record salary Hepburn modestly told her agent, "I'm not worth it. It's impossible. Please don't tell anyone."