For the occasion, the tennis player chose a Versace mini dress with intricate gold embroidery.
For the Glamour Women of the Year Awards, Williams turned to Donatella for her gilded LBD, which featured graphic gold detailing around the shoulders and hemline as well as showed off both her toned gams and super sculpted arms. During her speech, she said that the 22-year-old is one of the only people in the world she'd leave her daughter for a night to celebrate.
The Zuhair Murad FW/16 couture champagne-lace gown flattered her perfectly and she teamed it with cascading curls, bronze make-up and stiletto heels.
On September 1, 2017, Serena Williams gave birth to a sweet baby girl, who they named Alexis Olympia Ohanian, Jr. She finished the look with a high ponytail and a coordinating metallic hair accessory.
Showing she's the ideal little sis, Bella was more than happy to hold Gigi's hand as they headed to the venue.
And it's not the first time Bella has helped save Gigi from falling in the public eye.
"You are one of the few people on this planet I would leave my baby for-for one night", Williams joked to the model.
"Since I've known Gigi Hadid since she was a kid, she's always been a woman with goals", she added. When Gigi lost a shoe at Anna Sui's NY fashion show in September, Bella walked by her side during the finale for support.