Here are the main actors and actresses in the film:
* Chazz Palminteri as Don Ferdinando Carafa
* Raoul Bova as Salvatore Carafa
* Alessandro Preziosi as Duca Pietro Carafa
* Anna Valle as Giulia Carafa
* Claudia Gerini as Teresa
* Luisa Ranieri as Maria Stella
* Giancarlo Giannini as Don Francesco Carafa
* Ennio Fantastichini as Don Alessandro Carafa
* Vanessa Redgrave as Lady Caroline
There seems to be some confusion about the title, as the film "Poveri diavoli" (Poor Devils) was released in 2006, but it is not the same film as "I Viceré" (The Viceroys). If you are referring to a different film with the title "Poveri diavoli", please provide more information.