The Secret of Mayerling (French: Le secret de Mayerling) is a 1949 French Historical drama film directed by Jean Delannoy and starring Jean Marais, Dominique Blanchar and Jean Debucourt.

[2][3] It set around the 1889 Mayerling Incident when the crown prince of the Austrian Empire was found having apparently committed suicide with his lover.

It was shot at the Epinay Studios with sets designed by the art director Raymond Druart.

It was a commercial success in France and other European countries, including in West Germany where it was released by Constantin Film.

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