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Kirsten Dunst wore such a pretty updo at the Cannes Film Festival that we caught up with her hairstylist Marcus Francis to get details on the breezy look. “The feeling Kirsten and I were going for was flirty and undone with a bit of a whimsical effect to play off of her girly Dolce & Gabbana headband,” he said. Try out a similar style by positioning your accessory first, and after parting the back of your hair down the middle, start twisting and pinning sections upward, close to the headband. And don’t worry about perfect placement. “Subtle flyways add to this style, making it more wearable and modern,” he added. Would you try this look? 

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Stylist Elizabeth Stewart had a big job this week—dressing Jessica Chastain for the Cannes Film Festival. ”We have it down to a science,” the stylist told InStyle.com of the process at the ninth annual PS Arts fundraiser in Beverly Hills this week. “We’ve planned everything out beforehand. It’s like a military operation. We photograph everything. We send a PDF. There’s a printed and e-mailed copy. It’s pretty organized.” As for how she got her hands on so many beautiful gowns—Armani, Dolce & Gabbana, Alexander McQueen included—it’s also very methodical. “When you dress a girl like that, you have the world at your fingertips,” said Stewart. “Everybody wants to dress her.” See Stewart’s Cannes fashion show for Jessica Chastain in the gallery.

— Violet Gaynor and Lindzi Scharf