William and Kate are travelling to Scotland for a two-day tour which will see them visit a range of projects today from Glasgow's Sir Chris Hoy Velodrome where cyclists will be training, to launching a new Scottish project for their foundation.
The initiative is a pilot scheme which aims to inspire and train the next generation of young sports coaches.
The 18th century mansion was bought, along with its contents and adjoining land, by a consortium led by the Prince of Wales in June 2007.
Charles, known as the Duke of Rothesay in Scotland, will join his son and daughter-in-law as the Manoukian Foundation, a new outdoor centre for uniformed youth services and schools, is opened in the grounds.
The couple are known as the Earl and Countess of Strathearn when in Scotland - a title bestowed by the Queen to mark the Duke's marriage - and tomorrow they will travel to Dumfries House in Ayrshire.
The visit will be marked by a fly-past of three Typhoons from 6 Squadron, RAF Leuchars - a base close to St Andrews University in Scotland where William and Kate first met as students.
The royal couple will then travel to Barrow-in-Furness, Cumbria to learn about the new Astute Class of nuclear powered submarines being built for the Royal Navy by BAE Systems.
More top news
The young royal says he was reluctant to take on the responsibilities of his title, but loyalty to the Queen helped him "work out a role".
A rather cloudy morning will clear to sunny intervals and showers this afternoon.
Meng Meng and Jiao Qing arrive in their new home after being loaned to Berlin Zoo for 15 years as "diplomatic envoys" from China.