HAMILTON, NEW ZEALAND - APRIL 12:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge smile at each other as they visit the National Cycling Centre of Excellence and Avantidrome on April 12, 2014 in Hamilton, New Zealand. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge.  (Photo by Samir Hussein/WireImage)