Léa Seydoux on Cannes Fashion, Champagne Tips, and Friendship with Adèle Exarchopoulos

At the 2026 Cannes Film Festival, Léa Seydoux is competing with two films: Gentle Monster, a drama addressing a family fractured by pedophilia, and The Unknown, a psychological fantasy involving body-swapping. In a previous year, she had four films in competition but was unable to attend due to COVID. Seydoux shares her red carpet tip: a glass of champagne helps her unwind. Collaborating with stylist Alexandra Imgruth and Louis Vuitton, she crafted two unique looks—feminine and glamorous for Gentle Monster, and a more masculine style for The Unknown. She favors timeless elegance, drawing inspiration from Old Hollywood figures like Grace Kelly. For Gentle Monster's debut, she donned a navy off-the-shoulder gown, while for The Unknown, she opted for a sleek suit. Seydoux and her friend Adèle Exarchopoulos, her co-star in Blue Is the Warmest Color, exchanged graphic tees, marking their Palme d'Or victory 13 years prior. Exarchopoulos also has a film competing this year.