Niki Lauda
…Mariella von Reininghaus from 1968 to 1975. In 1976, he married the Chilean-Austrian Marlene Knaus. They divorced in 1991. Lauda and Knaus had two sons, Mathias, a racing driver, and Lukas, who acted as Mathias's manager. In 1992, Lauda briefly dated racing driver Giovanna Amati. In 2008, he married Birgit…