We're all familiar with Leni's mom, beloved German-born supermodel, longtime Project Runway host, and legendary Queen of Halloween, Heidi Klum. As for her very 'modern family' upbringing, Leni was raised by her stepfather, Seal, who was married to Heidi for 10 years, but her biological father is Flavio Briatore, an Italian businessman and former Formula One racing manager.

1 of 7