Fashion Charlize Theron Shuts Down the Cannes Red Carpet in a Stunning Yellow Gown By Kelsey Glein Kelsey Glein Twitter Kelsey Glein is a Seattle-based writer and editor who covers all things fashion, beauty, and pop culture. She was previously the Digital Editor of InStyle and is currently a Social Media Manager at a cosmetics company. InStyle's editorial guidelines Updated on May 14, 2015 @ 04:15PM Pin Share Tweet Email Photo: Pascal Le Segretain/Getty Images All we can say is wow. Charlize Theron stunned at today's premiere of Mad Max: Fury Road during the the 68th Annual Cannes Film Festival, as she glided down the red carpet accompanied by her beau Sean Penn. For the occasion, the actress donned an eye-catching sunshine yellow Christian Dior Couture gown that featured a sculptured scoop neck and flowing train. She completed her look with dazzling Chopard jewels, a glamorous updo, and barely-there makeup. This is one movie star moment we won't forget anytime soon. Tom Hardy and Charlize Theron Leave Our Hearts Pounding in New Mad Max: Fury Road Trailer But Theron wasn't the only well-dressed star at the event—Check out what Naomi Watts, Julianne Moore, Michelle Rodriguez, and more stars wore in our gallery. PHOTOS: The Best Red Carpet Looks from the 2015 Cannes Film Festival