In 1944, Horneff moved to and became an actor at where he played as a Nazi officer in many World War II films, , , personal, news reporter and defense soldier. Thereafter he became a character actor in both films and television series throughout the 1950s and 1960s. He also did a live commentary as a radio prestner in the CBS News Radio between 1948-1957. In 1958, he married Carla Addison (1923-2006), who was a makeup artist and had two children, Calvin (1960-) & Caroline (1962-). During the early 1960s, the family moved to Tokyo an a vacation when movie producers signed him up as a foreigner character for each movie studios like Toho and Toei from 1961 to 1969.