The flattering cream-colored trench, spring's must-have item, sported dark buttons, military details and a ruffle at the hem. She accessorized the $995 jacket with dark hosiery, black high-heeled pumps and a slim black clutch.
The couple's top-secret visit to Northern Ireland was part of their planned tour of the United Kingdom during the seven weeks leading up to their April 29 London wedding.
Middleton joined children attending a benefit for the Northern Ireland Cancer Fund in front of Belfast's City Hall to try her hand at flipping pancakes, in a traditional Shrove Tuesday event.
The prince and future princess each tossed pancakes into the air, landing them in a skillet. Prince William was a tad more adept at the maneuver, with Middleton almost dropping hers as this clip from the BBC reveals.
The couple also spent some time greeting well-wishers in the crowd at the event with one telling Middleton not to lose anymore weight before the royal wedding. Middleton reportedly laughed and said it was "all part" of the wedding planning, the BBC reported.
Meanwhile, read the latest speculation on the big name British design house that may have received the coveted honors of making Middleton's wedding dress.