CANNES — Cannes tends to favor drama not only on the screen, but the fashion kind, too — of trains, sequins and architectural gowns. For her latest appearance on the red carpet, Riley Keough was drawn to something softer. For her the choice was simple. “It was just one of the most beautiful things I’ve ever seen in my life,” she says of the wisp-thin and delicate skirt combo. It was an atypical red carpet selection. Instead of a voluminous gown, this was almost impossibly light. But the choice fit neatly into the mood currently surrounding Chanel — a house Keough has long orbited — since Matthieu Blazy has taken it in a new direction. Keough, who became a house ambassador in 2023, is embracing the new energy. You May Also Like “It’s like a whole new era, and just so like modern in a sense, but so sort of classically Chanel as well. It’s kind of genius,” she says of Blazy’s work. “It’s fun and joyful, unexpected and really vibrant,” she adds.…