My Worst Nightmare (original title: Mon pire cauchemar) is a 2011 French-Belgian comedy-drama film written and directed by Anne Fontaine, starring Isabelle Huppert, Benoît Poelvoorde and André Dussollier.

Icy, uptight Agathe is a successful art dealer who lives with her longtime partner François, a publisher, and their teenage son Adrien in a wealthy quarter of Paris.

Patrick feels guilty about encouraging François to abandon the family, and he attends one of Agathe's art shows, where they bond and then sleep together during a long night of drinking.

The next morning, social workers arrive for an inspection into the "couple's" home life, only to learn from an unwitting Adrien that their situation is dysfunctional, and Patrick is missing.

Despite the sham wedding, Agathe is happy to be with Patrick, and gifts him an expensive portrait that he can sell to finally achieve his dream of opening a concept aquarium.

Sometime later, he arrives at an opening to the aquarium concept he had dreamed of, and Agathe reveals that she had framed the defaced portrait, which is now considered a great work of art.

[7] Diego Costa wrote for Slant Magazine "My worst nightmare" was coined by a very Frenchkind of humor which could "go right over American audience's heads".