Trivia: The leather coat guy that Christina Applegate approaches at the bar is actually her real life husband.
Trivia: Rupert Everett ad-libbed two scenes: the one in which he kisses Colin Firth on the cheek, and the one where he heartily slaps Colin Firth on the bottom. The director, Oliver Parks, thought Firth's startled reactions were so funny that he kept both in the film.
Trivia: The poem Lucy reads to Ben at the campsite are lyrics to the Britney Spears' song, "I'm Not A Girl, Not Yet A Woman."
Suggested correction: I'm not really sure this would count as trivia considering how obvious it is. Ben even turns it into the song at the end of the movie.
Trivia: Julia Roberts was considered for the starring role of the maid, but she read an early version of the script and declined. Sandra Bullock was reportedly interested at one point.
Trivia: The officer speaking French is true to historical facts: it was mainly the French Foreign Legion fighting in Indochina at the time. However, the troops were predominantly of German origin (ex Wehrmacht and SS soldiers) and there is no detectable German accent in their French. True, this could be a fully French unit, thus no mistake. In live movies and interviews from the time, German accents in French are common.
Trivia: Samantha Morton plays Sarah Sullivan, the mother of Christy Sullivan (Sarah Bolger). In real life, Morton is only fourteen years older than Bolger .