Sergio Fantoni (7 August 1930 – 17 April 2020) was an Italian actor.

He was born in Rome, the son of actor Cesare Fantoni (1905–1963). In films from the late 1940s, he worked mainly in his own country but made several appearances in American films in the 1960s, most notably opposite Frank Sinatra in the war film Von Ryan's Express, made in 1965. In 1960 he played the villainous Haman in Esther and the King, starring Joan Collins and Richard Egan in the title roles. Among his TV roles, he appeared alongside Anglo-Italian actress Cherie Lunghi in the Channel 4 series The Manageress.

Fantoni died on 17 April 2020, at the age of 89.

Selected filmography

• Anthony of Padua (1949) – Un cavaliere
• Paolo e Francesca (1950)
• The Lion of Amalfi (1950) – Ruggero
• Le meravigliose avventure di Guerrin Meschino (1952)
• Captain Phantom (1953) – Officer in second
• Senso (1954) – Luca
• The Prince with the Red Mask (1955)
• Io sono la primula rossa (1955) – Lord Sheridan
• Nella città l'inferno (1959) – Giudice instruttore (uncredited)
• Hercules Unchained (1959) – Eteocles
• Caterina Sforza, la leonessa di Romagna (1959) – Giacomo Feo
• La notte del grande assalto (1959) – Marco da Volterra
• The Giant of Marathon (1959) – Teocrito
• The Employee (1960) – Sergio
• Escape by Night (1960) – Don Valerio
• Atom Age Vampire (1960) – Pierre Mornet
• I Delfini (1960) – Doctor Mario Corsi
• Esther and the King (1960) – Haman
• Il peccato degli anni verdi (1960) – Giulia's husband
• Il sicario (1961)
• Gioventù di notte (1961) – Commissario
• Man nennt es Amore (1961) – Fabrizio
• Pigeon Shoot (1961) – Nardi
• Morte di un bandito (1961) – Michele Galardo
• The Shortest Day (1962) – (uncredited)
• Ten Italians for One German (1962) – Gilberto di San Severino
• Catherine of Russia (1963) – Orloff
• Kali Yug: Goddess of Vengeance (1963) – Ram Chand
• Il mistero del tempio indiano (1963) – Ram Chand
• The Prize (1963) – Dr. Carlo Farelli
• High Infidelity (1964) – Luigi (segment "La Sospinosa")
• Corpse for the Lady (1964) – Commisario
• Von Ryan's Express (1965) – Capt. Oriani
• Do Not Disturb (1965) – Paul
• What Did You Do in the War, Daddy? (1966) – Capt. Fausto Oppo
• Diabolically Yours (1967) – Freddie
• Hornets' Nest (1970) – Capt. Friedrich Von Hecht
• Sacco e Vanzetti (1971) – Consul Giuseppe Andrower (uncredited)
• Bad Man's River (1971) – Colonel Enrique Fierro
• The Bloody Hands of the Law (1973) – Musante
• Una chica y un señor (1974) – El Señor
• Le Hasard et la Violence (1974) – Inspecteur Tanner
• E cominciò il viaggio nella vertigine (1974) – Andrei
• L'inconveniente (1976)
• Si elle dit oui... je ne dis pas non (1983) – Carniato
• The Belly of an Architect (1987) – Io Speckler
• Private Affairs (1988)
• Per non dimenticare (1992)
• The Accidental Detective (2003) – Baroni (final film role)