The royal family have been spotted wearing black boots, and have been photographed walking around a small garden area at Kensington Palace.
The couple are currently in Sydney, where they are expected to wed the bride and groom on Sunday.
They are expected in the royal gardens for the first time as they arrive for their nuptials, with a small group of family members taking photographs of them.
Royal groom Prince William and wife Catherine wear black shoes and black trousers during their wedding ceremony.
They appear to be dressed in a casual white shirt, blue jeans and white boots.
The groom and wife were pictured outside Kensington on Friday night, where the groom wore a black jacket and gloves.
The wedding is set to take place on Sunday, the day before the New Year.
The bride and her family are expected at Kensham Palace for their wedding.