Aishwarya wore a studded champagne coloured couture gown by Kuwait's designer Ali Younes for her first appearance at the ongoing festival.
Sharing a photo on Instagram of the actress from the red carpet, Abhishek, 40, posted, "They say a picture speaks a 1000 words. Seeing this photo I can think of many more..."
Aishwarya experimented with a metallic sheath overlaid by a sparkly floor-length cape. She wore her hair in loose waves.
The 42-year-old actress is celebrating 15 years of representing India and L'Oreal at the French Riviera.
The actress is accompanied to Cannes by daughter Aaradhya and mother Brinda Rai.