In the 1960s, Rigillo attended the Silvio d'Amico National Academy of Dramatic Arts and began his career on stage playing roles in plays by William Shakespeare, Carlo Goldoni, Bertolt Brecht and Luigi Pirandello.
Has also worked as a voice actor, providing the Italian voice to actors like Harvey Keitel and Ben Gazzara, as well as Geoffrey Rush in Elizabeth and Elizabeth: The Golden Age.