The models' mom, Yolanda Hadid, shared a throwback photo of the siblings dressed as angels to celebrate the pair walking in the 2016 Victoria's Secret Fashion Show.
"17 years after I photographed my 'ANGELS' Today is the day that they will be walking in the fashion show together......... #Excited #Grateful #Paris #VS #Sisters #ProudMommy," she captioned the picture.
Gigi and Bella appeared in the annual fashion show Wednesday in Paris, which will air Dec. 5 on CBS. The sisters had announced in October that they both landed the coveted modeling gig.
"There is no feeling in the world like walking down the runway. I'm elated to say I'll be returning to the @VictoriasSecret Fashion Show this year," Gigi, who previously walked in the 2015 show, wrote at the time.
"I can't believe it!" Bella said. "What a dream come true... I feel so appreciative and excited! Thank you for this opportunity to walk next to some of the most inspiring and incredible women in the world!"
Yolanda herself is a former model who later starred on the Bravo series Real Housewives of Beverly Hills. Bella recently told People her mom has proven to be a great source of support and a calming influence.
"[She's] my emotional angel," she said. "She always makes me feel so much better. Just like any mother would."