The 32-year-old took over the red carpet on Monday evening as she proved that thigh-high slits could be super classy in a floor-length satin baby blue gown. Margot Robbie Turns Her Red Carpet Gown Up a Notch With a Red-Lace Leg Slit By Chandler Plante Published on 1/17/2023 at 1:30 PM Getty | Lisa Maree Williams Margot Robbie was a vision. Robbie wore a belted Chanel black dress with a high-leg slit on the red carpet and accessorized with a Chanel purse.