The move prompted the Queen to organise a crisis summit regarding their future roles and it also raised a number of questions about what the exit will mean for the monarchy, from how the couple will fund their lifestyle to the impact on the line of succession.
While the couple have accepted that their decision to walk away from their royal roles means they will no longer receive public funding or be able to use their HRH titles, it has been confirmed that Prince Harry will maintain his current position in line to throne, which is sixth.
This is because the positioning is based on legislation meaning the government would have to step in to remove someone from the list.
Historian and author Marlene Koenig told Royal Central: “Succession to the throne is based on legislation including the Succession to the crown Act, which includes the Act of Settlement.
“It would take an act of Parliament to remove a person from the line of succession.”
While this is incredibly rare, it has happened once before. In 1936, Edward VIII abdicated from the throne, sparking a constitutional crisis which resulted in the King denouncing his position so he could marry American divorcee Wallis Simpson.
However he could not do this without an act of parliament.
In 2011, Commonwealth leaders agreed to change the succession laws so that both sons and daughters have the equal right to the throne.
Previous to this, the crown was passed lineally in birth order, but subject to male preference over females.
Prince Harry remains sixth in line to the throne after his niece and nephews. However, it is worth noting that, if the Cambridge family expands, the royal will keep moving down the line of succession.