童星
Child actor Lester Makedonsky was cast as Pierrot, and because of his swimming skills, the filmmakers chose swimming as Pierrot's sport. Haneke had also worked with Maurice Bénichou before on "Code Unknown" and "Time of the Wolf" (2003), on "Code Unknown". and Annie Girardot in "The Piano Teacher". Nathalie Richard previously played a character named Mathilde in "Code Unknown", both being friends of the two versions of Anne Laurent.