- Country: France
- Genres: Comedy, Thriller
- Release: 1986-03-05
- Director: Jacques Rouffio
- Writers: Georges Conchon , Jacques Rouffio
- Language: French
- Stars: Michel Serrault , Michel Piccoli , Jean Carmet , Juliette Binoche , Milva , Jean-Pierre Bisson , Tom Novembre , Isabelle Petit-Jacques , Agnès Garreau , Jean-Paul Roussillon
- Runtime: 95 min
- Awards: 1 nomination
- AKA: They've Killed Her! (United Kingdom) , Mon beau-frère a tué ma soeur (France, French Republic) , Mon beau-frère a tué ma soeur , Mój szwagier zabił moją siostrę (Poland) , My Brother-in-law Killed My Sister
- Plot: This parody of the detective-story genre merrily detours into spoofing French foibles as well, making it more of an exercise in verbal gymnastics than a narrative with a mission. Esther is a veterinarian who is certain that her sister has been murdered by her brother-in-law. She convinces two members of the Academie Francaise, the prestigious institution that protects the virginity of the French language, to investigate. Both men are enamored of the woman and are quite willing to enter into competition for her favors. As might be expected from academicians of any ilk, they are inept at digging into a murder mystery and bumble their way through one incident after another. Corpses continue to pile up (not in front of the camera, however) while the two men are sidetracked by their interest in language. Given their positions, they do not want that murdered either.
- IMDB:tt0089613
My Brother-in-law Killed My Sister Cast · · · ALL
Jacques Rouffio
Director
Michel Serrault
Octave Clapoteau
Michel Piccoli
Étienne Sembadel
Juliette Binoche
Esther
Jean Carmet
Jocelyn Bouloire
Jean-Pierre Bisson
D'H
Milva
Renata Palozzi
Tom Novembre
Léon
Isabelle Petit-Jacques
Micheline
Agnès Garreau
Muriel
Francis Girod
l'interviewer TV
Gérard Klein
le journaliste radio