The Sex And The City star and fashion icon turned up to the amfAR Inspiration Gala in Los Angeles, in honour of her agent Kevin Huvane, where the dress code was 'Black Tie and Sportswear'. But luckily Sarah Jessica had dug a vintage Chanel jumpsuit out of the back of her wardrobe and managed to look glamorous and sporty.
She revealed on the red carpet: "I didn't know there was a theme! Apparently there was a theme - there was an athletic theme and I had no idea.
"I styled myself. I picked it literally because it fit! This is an old Chanel jump suit, it's like 15 years old, that I've had in my closet. And my old Manolos [ Manolo Blahnik shoes]."
Sarah Jessica said: "Kevin's been my agent for 26 years. It's inspiring to see what's happened in his life, professionally, but also to see his family and what that's meant to him and what an integral part of his professional life it's been, the motivating force for him."
The actress presented Kevin with Piaget's Award of Inspiration for his contributions to the fight against Aids.
amfAR was founded in 1985 and is dedicated to ending the global Aids epidemic through innovative research.