But Gigi's modeling career goes back further than her famous family. She began modeling for Guess at age two.
In 2011, Gigi signed with IMG Models and her career took off. By 2012, she was named the face of Guess.
Guess
And still often appears in the brand's campaigns, posting this in January:
"Sneak peek, me n my custom denim! New @GUESS campaign coming out this month. Keep an eye out - so excited for you to see the new images as they're released! Going on 15 years as a Guess Girl, this may be my favorite campaign yet! Thank you @paulmarciano for always supporting me and my career, so much love for you and the whole team."
In 2014, Gigi made her New York Fashion Week debut walking the catwalk in the Desigual show in February.
"It was my debut. It was crazy; I got to walk with my idol Candice Swanepoel. She was in front of me in the lineup. It was just unbelievable," she said at the time.
"Gigi is a beautiful person on the outside and the inside too. She is a warm and kind-hearted soul," fashion icon and editirix Roitfeld told The Daily. "When Stephen Gan introduced her to me, we jointly send her to see [photographer] Bruce Weber, we knew she was a star about to be born."
In January, she was named the newest face of Maybelline, the number one cosmetics brand in the world, which counts models like Christy Turlington and Jourdan Dunn among other spokeswomen.