The mum-of-three stuck to the request to “dress sustainably”, wearing a gown last seen on a royal tour in 2012.
From vibrant colours to all black, there was plenty of variety on display on the red carpet tonight. Most wore custom couture for one of the most glittering nights in the awards calendar.
Reflecting the cool, arty vibe of London, many of the stars chose unusual and modern designs.
Take a look here for all of the dresses seen on the red carpet tonight.