Hippolyte, the titular oddball, is a far from typical country lawyer. He has been happily married to the woman of his dreams for 15 years, but has an incurable penchant for practical (or rather impractical) jokes.

Thierry Lhermitte
as Hippolyte Pecheral

Caroline Cellier
as Camille

Christian Pereira
as Grégoire

Annie Grégorio
as Marie-Louise

François Dyrek
as Alphonse

Carine Lemaire
as Nathalie

Walter Allouch
as Laurent

Brigitte Chamarande
as Anne

Jean-Marie Cornille
as David

Samuel Labarthe
as Nogaret