Gigi Hadid marked her sister Alana Hadid's 40th birthday in grand style. The 28-year-old model took to Instagram to commemorate the occasion with a special post. The picture featured Gigi striking a pose with Alana and their other sister, Marielle Hadid, at Alana's lavish Toga party in Beverly Hills over the weekend. Gigi donned a cream-colored dress that showcased her midriff and was adorned with large knots. She kept her accessories minimal but elegant, including a chain necklace, pearl earrings, and nude flats. 

Gigi opted for a sleek bun hairstyle to complete her chic look. Marielle, on the other hand, wore an opalescent one-shoulder minidress paired with gold wedge sandals. Alana, the birthday girl, went all out with her Greek goddess-inspired ensemble. She donned a metallic purple gown featuring a crossover halter top, a thigh-high slit embellished with o-rings, and gold leaf-like armbands, a laurel wreath, and winged sandals. Makeup artist Patrick Ta, who attended Taylor Swift's Eras Tour with Gigi the day before, also shared snaps of the celebration on his Instagram. 

The festivities included a dance floor, a temporary tattoo station, and a gold-leaf covered cake topped with a toga-clad figurine. Alana expressed her gratitude on her own Instagram, calling it her "Grecian Goddess Dream 40th" and expressing her love and appreciation for friends and family who had joined from all over the world. She also thanked her sister Marielle for designing a custom neon sign for the event. Overall, it was a night of celebration and glamour for the Hadid sisters and their loved ones.