According to director Fred Zinnemann's 1992 autobiography, Marietto, who appeared in Zinnemann's "Behold a Pale Horse", grew up to become a physician in Italy.
States that he was born on December 18, 1950 in Rome.
Italian child actor who appeared in Italian, American, German and French productions from 1958 to 1964.
After quitting acting became a medical doctor. Still works (2021) as a gynaecologist in Frosinone (Italy).