My brother-in-law killed my sister

Mon Beau-frère
a tué SŒur

A film by Jacques Rouffio

Veteran director Jacques Rouffio creates a melange of genres with his witty and topsy-turvy comedy Mon beau-frère a tué ma sœur (My Brother-in-law Killed My Sister).


On the venerable occasion of his succession to l'Academie Française, the academic and author Etienne Sembadel (Michel Piccoli) meets a patient of his best friend, the celebrated psychoanalyst Octave Claopteau. She is the entrancing Esther Bouloire and she is making some quite alarming claims; namely that her brother-in-law killed her sister.


Not believing her claims for a moment but wanting to spend time with the young ingénue this bumbling duo begins an investigation. Quickly that investigation will lead them into great danger as it emerges that Esther’s uncle, Jocelyn Bouloire (Jean Carmet), may have bumped off several members of his family to conceal his involvement in the Banco Ambrosiano scandal and his association with the P2 Lodge. As they get ever more entangled Etienne, Octave and Esther find their investigation leads straight to the highest powers in The Vatican and peril for all involved.


Mon beau-frère a tué ma sœur was the first and only pairing of veterans Michel Piccoli and Michel Serrault and was premièred in competition at the 1986 Berlin Film Festival.

Octave Clapoteau

Michel Serrault

Etienne Sembadel

Michel Piccoli

Jocelyn Bouloire

Jean Carmet

Esther Bouloire
Juliette Binoche

Renata Palozzi

Mon beau-frère a tué ma sœur
– Trailer –

French trailer with English subtitles


– Posters –


– Stills –


– Select scene –

"Crazy Esther"


– From the Archives –

Behind the scene of Mon beau-frère a tué ma sœur


Mon beau-frère a tué ma sœur - Title play


– Soundtrack –
Mon beau-frère a tué ma sœur

"Mon beau-frère a tué..." by Philippe Sarde

"Ma soeur" by Philippe Sarde


– Documents –
Mon beau-frère a tué ma sœur

Press kit
PDF - French


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