The gala, held every year during the film festival, raises funds for fight against AIDS.
The stars, who will be ambassadors for cosmetic brand L'Oreal Paris at the 12-day festival, also include Lara Stone, Natasha Poly Li Yuchun, Doutzen Kroes and Soo-Joo Park.
The gala will take place at Eden Rock on May 21.
It will be 41-year-old Aishwarya's fourth consecutive year at the prestigious charity gala.