Heidi Klum’s daughter, Leni, just graduated from high school. Heidi proudly celebrated her achievement, sharing videos and photos of her daughter. RELATED: Heidi Klum’s daughter Leni talks about ‘winging it’ at her first fashion show Heidi Klum’s 18-year-old daughter Leni is the supermodel’s mini-me View this post on Instagram A post shared by Heidi Klum (@heidiklum) The video shows Leni walking across the stage to get her diploma. While Heidi screams and celebrates, Leni smiles with excitement. “I am VERY proud of YOU,” Heidi captioned the post. She then shared a boomerang of . . .