The 41-year-old actress, who will be attending the prestigious festival as the brand ambassador of L'Oreal Paris, will take over the cosmetic brand's social media accounts on May 20.
She will walk the red carpet on May 17 and 20, and will attend the amFAR charity Gala on 21 with her husband actor Abhishek Bachchan.
The "Guzaarish" star for the first time ever, while at Cannes, will participate in a twitter chat where she will share her experiences and answer questions.
Aishwarya will also give a tutorial on some make-up basics along with a few secret make-up tips.