Kate Middleton is on a roll! Just days after her sailing lesson in London, the Duchess attended the Chelsea Flower Show in England with Prince William, brother-in-law Prince Harry, and Queen Elizabeth II on Monday. It was the first time that William and Kate — who was clad in a bright kelly-green coat dress from Catherine Walker — had visited the event, which has been running since 1913. However, Harry has been involved in previous years, as his Sentebale charity often designs a garden. Next month, the family is scheduled to attend the Trooping the Colour parade, where Prince George made his debut last year.