Middleton, dressed in camouflage and hunting boots, accompanied William's father, Prince Charles, on a hunting trip Saturday during a family weekend at Balmoral.
The intimate family gathering fueled speculation of a possible engagement, though sources close to the couple say any announcement would not happen before next year. Bookmakers are so convinced the two 25-year-olds will marry they have stopped taking bets on whether it will happen, the Telegraph reported.
Balmoral became a royal home in 1852, ten years after Queen Victoria became enthralled by her “dear beautiful Highlands."
Swim Week Miami Beach 2014 [PHOTOS]