Tiny shorts, legwarmers, sparkly tops and neon: Kate's outfit had all the essentials for her rollerdisco last night.
She held the event jointly with Holly Branson (Sir Richard's daughter) to raise money for the Children’s Hospital in Oxford and the Place2Be (which provides counselling for children and families).
Since the brother (Thomas Waley-Cohen) of a close friend of Kate died from cancer in 2004, Kate has been raising money to have Tom's Ward created to specialise in general surgery for sick or injured children.
Rumour has it that Wills and Harry were invited but we wonder if their forces training paid off when it came to roller skating in pink neon?!
Take a look at Holly and Kate in all their 80s glory below.