Marion Cotillard Wears Two Chanel Looks at the 2026 San Sebastián Film Festival

Marion Cotillard gave fans a stylish Chanel double act at the 2026 San Sebastián International Film Festival, switching from relaxed daytime glamour at the photocall to a dramatic sheer couture look for the red carpet.

The French actress arrived in San Sebastián on September 24 to promote 7h40 ce matin-là ( Milo ), Nicole Garcia’s new French drama, which is competing in the festival’s Official Selection. The festival’s official schedule listed Cotillard for the film’s photocall, press conference and red-carpet appearance at the Kursaal Theatre.

For the photocall, Cotillard opted for a surprisingly relaxed Chanel look. She wore a loose ivory short-sleeved top with a round neckline, pairing it with a dramatic black skirt featuring cascading, sculptural ruffles down the front. The simple top allowed the skirt to do most of the talking, while a pair of interlinked Chanel chain details draped across the front added one of the fashion house’s most recognizable signatures.

She finished the daytime look with metallic pointed-toe Chanel pumps and carried black sunglasses in one hand. Her long dark hair was worn loose and naturally sleek, while understated makeup kept the overall styling fresh against the bright coastal backdrop.

For the evening, Cotillard completely changed direction. She stepped onto the red carpet in a black Chanel Spring-Summer 2026 Haute Couture dress, featuring a simple fitted black base underneath a long, transparent overlay. The sheer fabric extended dramatically from the shoulders to the floor, creating a lightweight, flowing silhouette that moved beautifully as she walked.

The couture look was finished with Chanel shoes and Chanel Fine Jewelry, adding a polished touch of sparkle to the otherwise all-black ensemble. Cotillard wore her brunette hair pulled back into a sleek low style, allowing the neckline and sheer sleeves to remain the focus.

The choice of Chanel was particularly fitting. Cotillard has a longstanding relationship with the house and is officially a Chanel ambassador. Chanel identifies her as both an actress and House ambassador, and she has regularly represented the brand at major international film events.

Known internationally for films including La Vie en Rose, Inception, The Dark Knight Rises and Two Days, One Night, Cotillard has long mixed French sophistication with a slightly unconventional red-carpet approach.

And in San Sebastián, she showed exactly why the Chanel partnership works so well: one look was easy and modern, while the other delivered full couture drama.