Norbert Grupe (August 25, 1940 – March 10, 2004), better known outside Germany by his stage name Wilhelm von Homburg, was a German boxer, actor, and professional wrestler. He was known for his villainous supporting roles in many movies of the 1980s and 90s, including Vigo the Carpathian in Ghostbusters II, the henchman James in Die Hard, and Souteneur in Werner Herzog's Stroszek. He was born in Hamburg.
von Homburg died of prostate cancer at a friend's house in Puerto Vallarta, Mexico on March 10, 2004 at the age of 63.