But it may come as a surprise that their mother, Yolanda Hadid banned the girls from modelling until they turned 18!
In a recent interview with Elle, Yolanda confessed that, "I never let them work [as models] before they were18. I didn't want anybody judging them on what they looked like. I wanted them to feel and be the authentic human beings that they are, and I think that created a lot of strength for them," she said.
"I always said to them, listen, there are thousands of girls that are much more beautiful than you girls, but you have an extraordinary character, and you're going to have to set yourself apart by being a role model, by showing up on time and being kind to everybody... to the light people, the make-up, the cleaner in the back of the studio. Those are the people that you have to connect with, and that's how you can make a difference in the world."
Wise words mumma Hadid.
Obviously, the girls have been absolutely #KillingIt in the industry, so maybe their mum was onto something there.
Gigi signed with IMG Models and made her fashion week debut in February 2014, a few months shy of her 18th birthday. QUEEN!