Wisniewski was born in Berlin, Germany to a Polish father and German father and spent the early part of his life practicing dance before turning to acting. Wisniewski's first major role was as Necros in The Living Daylights. He later went on to star in 1988 blockbuster Die Hard and popular action film Mission Impossible. Wisniewski later retired from acting and concentrated on Buddhism. Wisniewski was married to a Brazilian supermodel and has one son.