Although his work has primarily been in French film and theater, Arditi is known in the Anglophone world as the French voice of Christopher Reeve. Arditi dubbed Christopher Reeve on the French-language version of the three first Superman films by Richard Donner and Richard Lester. Because of the added footage in the DVD Special Edition of Donner's Superman, the movie had to be re-dubbed with a different voice actor, much to the chagrin of the generation of moviegoers who had grown up with the original soundtrack and identified Superman's voice with Arditi's. He also provided the French voice for Reeve in the comedy/whodunit Deathtrap. Finally, he was the voice of the documentary series Untamed Africa, written and produced by Frederic Lepage.