Kate Middleton in Alexander McQueen at Irish Guards Parade

>> Sarah Burton at Alexander McQueen is quickly becoming Kate Middleton's go-to designer for official royal engagements, between her McQueen wedding dress in April, the white McQueen peplum coat Middleton wore for her first official outing earlier this month, and most recently, the navy McQueen military dress she wore over the weekend for Irish Guard Armed Forces Day.

The most recent dress, which was noted to be from McQueen's Pre-Fall 2011 collection, seems to be custom made, as no piece from the lookbook quite matches up. The closest look has more dramatic, peaked shoulders and a more revealing v-neckline than Middleton's version, which she paired with Prada shoes and an Anya Hindmarch clutch.

Will Middleton wear more McQueen on her official visit to North America, which begins on June 30, when she and Prince William touch down in Canada? She was spotted at the McQueen offices in London last week with a garment bag under her arm, which appeared to contain something red. And royal officials confirmed that she may be striking "private agreements" with designers to help build her North American tour wardrobe — at this point, Burton seems a likely candidate (Middleton was also spotted at Wimbledon today wearing Temperley — another likely contender).

Speaking of Burton, WWD reports today that she's at the top of the wishlist to take over at Dior — and this strong connection with Middleton can't be hurting her chances.