Duchess Of Cambridge Arrives In Canada On Thursday (PHOTOS)

Thursday morning, the Duchess of Cambridge demonstrated some excellent runway style -- on the airport runway, of course. The former-Kate Middleton and her husband Prince William departed from London's Heathrow Airport for their Canadian and L.A. tour.

For her first trip ever to the States, Catherine wore a tasteful if not a tad bit uninspiring navy jacket by Canadian label Smythe Les Vestes paired with navy Roland Mouret dress and basic pumps by Manolo Blahnik. The standout was her luxe leather bag, which Elle UK identified as the Mulberry Polly Push Lock Tote (which of course will now sell out in a matter of minutes, despite the $1,400 price tag).

As expected, Catherine changed into a fresh look as she and Prince William deplaned in Ottawa and chatted with Canadian officials. The Duchess had her enviable head of hair tied back and donned Erdem's Cecile dress from the Canadian designer's Resort 2012 collection , as well as shoes by LK Bennett and the same beige clutch she carried at Wimbledon and at Prince Philip's 90th birthday service .

In the evening, Catherine stopped by an informal reception for young Canadian volunteers, where she ditched the lace for a printed Issa dress we first saw the day before her wedding . She completed her outfit with LK Bennett wedges.