Carlo Alberto Pinelli says the actress died May 1 in Spain, after suffering a thigh-bone fracture. LeBeau was the second wife of Pinelli's father, the late Italian screenwriter Tullio Pinelli.
LeBeau had been living with a daughter, Maria Duhour, who informed the younger Pinelli of the woman's death.
Lebeau was cremated, and her ashes will be brought to Italy sometime in the coming months to be placed in the family tomb, Pinelli said.
In the iconic World War II movie, LeBeau famously gets emotional in the bar when the band starts playing ""La Marseillaise," shouting "Viva la France!" She was among several actual refugees from the German occupation of France who acted in the film.
The BBC reports she was the last surviving cast member of the film, which won three Academy Awards and is frequently listed among the greatest movies ever made.