High Quality Content by WIKIPEDIA articles! Don Juan DeMarco is a 1995 American romantic comedy-drama film starring Johnny Depp as John Arnold DeMarco, a man who believes himself to be Don Juan, the greatest lover in the world. Clad in a cape and domino mask, DeMarco undergoes psychiatric treatment with Marlon Brando`s character, Dr. Jack Mickler, to cure him of his apparent delusion. But the psychiatric sessions have an unexpected effect on the psychiatric staff, some of whom find themselves inspired by DeMarco`s delusion; the most profoundly affected is Dr. Mickler himself, who rekindles the romance in his complacent marriage.