[1] Fux was born in Hallein, at the age of five he moved with his family to the city of Salzburg, where his stepfather worked as a board member of the Landestheater.

Having passed his matura exams under the circumstances of late World War II in 1944, he studied at the Salzburg Mozarteum University and began a career as a theatre actor.

The huge number of Fux' appearances in about 120 film and 300 TV productions, also under the direction of renowned filmmakers, included a wide range of secondary parts, often distinctive, quirky characters.

During his long career, he worked with directors like Michael Anderson, Christian-Jaque, Wolfgang Staudte, Volker Schlöndorff, Franz Antel,Ingmar Bergman, and Werner Herzog as well as with famous actors such as Klaus Kinski, Udo Kier, Vincent Price, and Ulrich Matthes.

[2] In 1977 Fux was among the founders of a citizens' initiative against commercialization and uglification of Salzburg's historic townscape and became an elected member of the city council.