Marlene and Niki have two sons together, Mathias, a racing driver himself, and Lukas, who also acts as Mathias’s manager. Lauda also has a son, Christoph, through an extra-marital relationship.
Lauda and Marlene got married in 1976 and divorced in 1991.
In 2008, Niki married his second wife Birgit, who is 30 years his junior and was a flight attendant for his airline. She donated a kidney to Lauda when the kidney he received in a transplant from his brother, years earlier, failed. In September 2009 Birgit gave birth to twins, a boy and a girl.
Photo Source/Credit: Costaa.com