So, how does the almost 40 year old mother of four keep herself looking so beautiful? According to the Project Runway host, the answer is "don't be too thin".
In an interview with US magazine, Self, the supermodel said that "having a little meat on your bones" is the best way to stay looking young. "When you are just muscle, you end up looking gaunt in the face, and that makes you look older by five or ten years".
It's no surprise that Klum isn't thinking of getting Botox anytime soon either. "I feel comfortable in my skin and comfortable with my age so I think it's ok that I get wrinkles".
Somehow, we think it will take more than a few wrinkles to stop Heidi looking gorgeous.
Visit self.com to find out more top beauty tips from Heidi.