The royal couple was seen entering the church with the newly crowned King and Queen Camilla.
During the crowning ceremony, Prince William will take an oath of loyalty and allegiance to the new monarch.
Pictures taken at the ceremony show the Duke and Duchess of Cambridge inside the church along with their children, Prince Louis and Princess Charlotte.
As part of the ceremony, Prince William will kneel before the new King and place his hands between the hands of the monarch. He will then pledge his loyalty by reciting, "I, William, Prince of Wales, pledge my loyalty to you and faith and truth I will bear unto you, as your liege man of life and limb. So help me God."
It is worth noting that Prince Harry had entered the Abbey before William and Kate, along with his cousins and close family members.
