Aishwarya looked ethereal in a sheer green tiered ensemble by Yanina Couture.
The actress teamed up her look with L'Oreal Paris True Match Lumi Powder Highlighter in Rose and the Tint Caresse in Rose Blossom blended with Orchid Blossom on her lips.
She kept her hair open with soft waves cascading down her shoulders.
Aishwarya made her debut at the film carnival in 2002 to present her film "Devdas". She became a regular at the gala as the face of the cosmetic brand.
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The 43-year-old actress, who arrived in the French city with her daughter Aaradhya, is set to walk the red carpet as L'Oreal Paris brand ambassador tomorrow and will attend the brand's Paris Open Air Cinema event.
Deepika Padukone already walked the red carpet yesterday in a sheer violet Marchesa gown, while another Bollywood actress Sonam Kapoor is yet to attend the event on May 21 and 22.
The festival runs from May 17 to 28.