Ahna O’Reilly made her first-ever Cannes Film Festival experience a memorable one! The actress has put on a full fashion show in the French Riviera, as she showed up to event after event in high-fashion looks. The latest we love: This Monique Lhuillier design, which she paired with Salvatore Ferragamo shoes, H. Stern earrings, and a Jennifer Behr headband—and she gave us the exclusive behind-the-scenes look at the process to get her red carpet-ready. “I felt amazing in the dress,” she told InStyle.com exclusively. “Ever since I put it on for the first time, I knew it was what I wanted to wear. Walking the red carpet in Cannes for the first time was surreal, and a total dream come true.” Click through the gallery for a closer look, and get details from her glam squad, including stylist Caley Lawson, hairstylist Kylee Heath, and makeup artist Kindra Mann on how they made her dream a reality.