Anthony Steffen (July 21, 1930 – June 4, 2004), pseudonym of Antônio Luiz de Teffé von Hoonholtz, was an Italian Brazilian actor who achieved fame as a leading man in over 25 Spaghetti Westerns.
Born Antonio Luiz de Teffé von Hoonholtz at the Brazilian embassy in Rome, in the Pamphilj Palace, his family had noble blood of a long lineage of Count (von Hoonholtz) originally from Prussia. His great grandfather was the Great Baron of Tefé. First born among Manoel de Teffe' von Hoonholtz children (Federico de Teffe' and Melissa de Teffe'), a Formula One racing champion and Brazilian Ambassador and his grandaunt was Nair de Tefé von Hoonholtz. While still a teenager, Antonio fought in World War II along the partisans against the Nazis.
Under the name Antonio de Teffé, he worked behind the scenes in several Italian productions in the early 50's and later acted in several movies, but never really achieving stardom. In 1962, he had a bit part in Sodom and Gomorrah.
An early appearance of his was in the 1955 Gli Sbandati.