Known as the Earl and Countess of Strathearn, the Royal couple are touring the Strathearn area in the heart of Scotland.
Among the highlights of the day is a tour of a whisky distillery, giving them a chance to learn more about Scotland's national drink.
The couple will be given the chance to bottle their own Glenturret malt at the country's oldest distillery, near Crieff in Perthshire.
But they began their day with a visit to Strathearn Community Campus in Crieff, where they met representatives of local volunteer groups.
They were greeted by crowds of hundreds of excited locals, including many schoolchildren, who waved Saltires and Union flags.
Kate wore a coral and red striped coat by Scottish designer Jonathan Saunders and a dress by Goat.
The outfit was topped off with beige heels, a matching clutch bag and a celtic brooch given to her as a wedding present.
It is the couple's first joint engagement since returning from a tour of Australia and New Zealand last month.
On this occasion, however, the royals were not accompanied by their young son Prince George.
During the overseas trip Kate appeared to quash any speculation she may be expecting a second child when she told wine-makers how she was enjoying being able to drink again after giving birth to George.
The last time the couple travelled to Scotland in an official capacity was in April last year, when they accompanied the Prince of Wales to Dumfries House in East Ayrshire for the opening of an outdoor centre. They also visited Glasgow's Emirates Arena, a key venue in this summer's Commonwealth Games.