The actress kept strictly to the White Tie and Decorations dress code, teaming her couture dress with a show-stopping up do and white elbow-length gloves.
Oscar de la Renta, with his signature feminine silhouettes, was a perfect choice for the Met Ball's Charles James-inspired theme, so it's unsurprising that several other well-dresseed celebs chose to wear the designer.
Taylor Swift looked stunning in a pale pink number, and Clare Danes followed suit in an elegant strapless pink number. Meanwhile, Amy Adams wowed in a metal silver gown, and Girls star Allison Williams wore a beautifully simple coral dress.
Sometimes, sticking to the dress code pays off...
By Olivia Marks