Over 1000 Pakistani police officers have been deployed as security for the royal couple and their itinerary will be kept secret until the day in order to keep them safe.
Their visit to Pakistan has been described as the most 'complex' and 'demanding' tour of their careers.
‘They are now in their late 30s and ready to take on these more complex and demanding tours on behalf of the British Government,' said a royal aide.
Kate Middleton wore an aqua shalwar kameez - a traditional Pakistani outfit - by British designer Catherine Walker. Her outfit drew comparisons with a similar outfit worn by Princess Diana when she visited Pakistan in 1996.
Their five-day visit is a bid to further improve relations between the UK and Pakistan. Requested by the Foreign and Commonwealth Office, it comes during heightened tensions between Pakistan and India over the disputed region of Kashmir, which both countries are claiming in full.
They have left their three children at home and will travel over 1000 kilometres of the country.
They were greeted from the plane by a group of school children and William is expected to give a speech later in the week.