When I first heard about Jeanne du Barry, the sumptuous and extravagant French epic about the infamous, powerful but rarely mentioned final mistress of King Louis XV, with author-actress-writer-producer Maïwenn as the director and—hold on to something for balance—Johnny Depp as the king…the temptation to laugh out loud stretched from here to deadline. But truthfully, to my surprise, he does nothing wrong as the unconventional monarch, and there are even scenes when he emerges subtly poised, understated and dramatically triumphant.