Fake Nationality: The film features an eclectic array of fake Frenchmen. Most notable were Englishman Jeremy Irons as Aramis, Irishman Gabriel Byrne as D'Artagnan, American John Malkovich as Athos, American Peter Sarsgaard as his son, and American Leonardo DiCaprio as King Louis XIV, none of whom particularly bothered to disguise their country of origin. This was made particularly noticeable by having actual Frenchpeople, Gérard Depardieu and Anne Parillaud, round out the cast as Porthos and Anne of Austria — who, despite her designation, was from Spain. Judith Godreche (Christine) is the only other French actor.
Follow the Leader: This film was a part of a wave of modern swashbucklers that updated classic stories that followed up the success of Robin Hood: Prince of Thieves. Notably a few years prior a previous film that was a part of this trend was an unrelated version of The Three Musketeers (1993). It would appear a number of people growing up were confused as to whether or not this was supposed to be a sequel to that film interestingly enough.
What Could Have Been: It's a shame that an actual Three Musketeers film featuring a younger Byrne, Depardieu, Malkovich and Irons was never made. Such awesomeness would have reached critical mass, likely triggering the apocalypse.