Kate chose to wear the blue print Bella dress from Whistles - the same one she wore to the Diamond Jubilee concert in June. Her look was complete with a black waist belt and her style staple, a black satin clutch.
Blue was obviously the colour of the night as Samantha Cameron also wore a cobalt shade and Prince Harry paired his suit and shirt with a turquoise tie. The trio were just missing a bit of red and white...
So how do you rate Kate's high-street dress recycling? Let us know in a comment and see more from the Olympics 2012 Closing Ceremony below:
See highlights from last night's show below: