I think I might be able to pull this off! I never thought of making anything by Lululemon work in a formal setting, but this could happen. Right?
Mock Turtleneck: Lululemon (similar item linked)
Skirt: Tifus Dress Women's Pleated Velvet Midi Skirt
Necklace: Three Strand Pearl Necklace
Shoes: Cole Haan Black Pumps