She hit the catwalk in two very different looks. The first was a very sporty ensemble that consisted of a cropped "TH X GH" tee, royal blue, black and white leather pants, black booties and a thick choker.
The blond beauty later closed the show, walking alongside Hilfiger himself in a one-shouldered dress that featured a white-and-black color block top, ab cut-out, striped waistband and sheer skirt covered in a race car-themed print.
It was also a family affair for Gigi in Italy. Her younger sister, Bella Hadid, walked directly behind her in the show. She sported a checkered visor, tube top, striped asymmetrical skirt and black sneakers, as well as the same choker as her sibling.
The 21-year-old model then swapped into a similar dress as Gigi's, though Bella's featured a black top and zipper and a darker printed skirt, to lead the pack at the close of the show.
Orange Is the New Black star Ruby Rose was sitting front row and proudly posted video on her Instagram Story of the Hadid sisters sashaying down the runway.
Not only did Gigi leave her mark on the #TOMMYNOW runway, she also left a more permanent one (of the ink variety) at the Tommy Hilfiger's headquarters in Milan, Italy, earlier in the day.
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Gigi and Bella Hadid Pose Completely Naked Together for 'British Vogue'
Also ahead of the show, Bella proudly popped champagne in her talented sister's honor, sharing a video of the celebration on Instagram after they wrapped and were en route to Paris for the next fashion week round.
" And I've been telling you all night... but @gigihadid I am so beyond proud of the hardworking, kind, talented, smart, funny woman that you are ETCETCETC... (your perfect face being the least of your attributes)," Bella wrote. "Congratulations on your 4th and final tommyxgigi collection....You exceeded all expectations, not only from me but everyone around you."
"I am not surprised that you had another perfect show but yet again, you have surprised me, as you do every day ❤️," she continued. "I love you to the moon and back tiny cub."