The Secret Mark of D'Artagnan (Italian: Il colpo segreto di D'Artagnan, French: Le secret de d'Artagnan) is a 1962 Italian-French adventure film written and directed by Siro Marcellini and starring George Nader and Magali Noël.
The film is about the adventures of D'Artagnan in the year 1632, between The Three Musketeers and Twenty Years After.