The ceremony is due to take place today at a church in the remote town of Arosa in eastern Switzerland. The royals are among 250 invited guests.......telegraph.co.uk
Shortly after arriving in the country yesterday, the Duchess was spotted carrying a wooden sledge, while wrapped in a brown coat and wearing oversized sunglasses.
Princes William and Harry reportedly took to the slopes in the afternoon but the pregnant Duchess apparently gave skiing a miss.
William and Harry have played polo with Mark for many years and the Prince of Wales is a close friend of his parents, Simon and Claire.