For the final scene of Fahrenheit 451 (1966), he cut his hair to purposely create a continuity error. This was done to show his hatred for director François Truffaut.
He died only two days after the death of director François Truffaut, who directed him in two of his most famous films, Jules and Jim (1962), and Fahrenheit 451 (1966).
He is buried in a town called Triesen in Liechtenstein.
His ex-wife, Anne Power, is the daughter of actress Annabella and her ex-husband, Jean Murat, and was adopted by Tyrone Power.