Piero Regnoli (1921–2001) was an Italian screenwriter and film director. Born in 1921, Regnoli worked in the film industry between 1953 and 1991 where he wrote over 110 screenplays and directed 11 films. Regnoli's work ranged from sword-and-sandal films, westerns, horror and sexy comedies. His final film where he was officially credited as a director was La principessa sul pisello in 1976. Regnoli did uncredited direction on the 1986 melodrama Giuro che ti amo starring Nino D'Angelo.Regnoli was also employed as the film critic for the Vatican's daily newspaper L'Osservatore Romano. Regnoli died in 2001.