The grand apartment boasts five reception rooms, three main bedrooms, dressing rooms, a day and night nursery and staff bedrooms.
Kensington Palace is also home to 15 other members of the royal family, including Prince and Princess Michael of Kent and Princess Eugenie and husband Jack Brooksbank.
Will and Kate also used to live in a two-bedroom property called Nottingham Cottage.
When Prince George was born, Will and Kate lived at Kate’s parents’ home, named Bucklebery Manor, an 18-acre estate with seven bedrooms and a tennis court.
Prince Harry and Meghan Markle also lived at Nottingham Cottage, before the Palace announced they would be moving into a Windsor home before the birth of their baby.
When the Queen dies, it has not yet been confirmed it William, Kate and the royal children will move into Buckingham Palace – however it is likely.