The 22-year-old model wore a cleavage-baring Vivienne Westwood gown, which she accessorized with a sparkling two-strand necklace. The British star, who often sports jeans and sneakers in her down time, wore her hair in simple curls.
Delevingne was honored with Best Breakthrough Actress at the ceremony. The annual awards show, hosted by Elle magazine, recognizes fashion designers, models, actors and other entertainers. Singer Taylor Swift walked away with the coveted Woman of the Year accolade.