TRURO, UNITED KINGDOM - SEPTEMBER 01: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at Truro Cathedral during a royal visit to Cornwall on September 1, 2016 in Truro, United Kingdom. (Photo by Ben Pruchnie/WireImage)
TRURO, UNITED KINGDOM - SEPTEMBER 01: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at Truro Cathedral during a royal visit to Cornwall on September 1, 2016 in Truro, United Kingdom. (Photo by Ben Pruchnie/WireImage)