In the afternoon, William and Kate will head to the historic building of St Luke's church which is now home to the London Symphony Orchestra (LSO) to help locals prepare for the Commonwealth Big Lunch. Her floral top is from Hobbs, paired with black pants and a cream coat from Goat, one of her go-to brands.
Wills, 35, and Kate, 36, kicked off the day at Olympic Park with a visit to SportsAid, a charity that helps challenge and encourage the next generation of British Paralympic athletes.
The couple were pictured arriving at London's Copper Box Arena to meet young sportspeople hoping to partake in some of the world's leading sporting events including the Olympics, Paralympics and Commonwealth Games.
Sure, she's worn trousers before but we're so used to seeing her in her usual dress/skirt and coat combo that this latest look has caught us a little off guard. Join our Facebook group for the latest updates on Princess Diana, Prince Harry, Kate Middleton, Prince William, and all things royal!