The watch over her mother's coffin was the first of its kind by a princess. Daisy McAndrew said it was the first time a woman had participated in the somber royal tradition.
The children of Queen Elizabeth II watched as well-wishers paid their respects in the cathedral.
A group of princes, including King Charles III, Princess Anne, Prince Andrew, and Prince Edward, joined the Royal Company of Archers to guard the coffin.
This is the third time that the vigilance of the princes has taken place. King George V died in 1936. The second happened during the funeral procession.
The photos show King Charles standing near the coffin. Princes Andrew and Edward wore suits, while Princess Anne and Prince Edward wore their military uniforms.
Sky News reported that the queen and prince watched the event from the side. The late queen's coffin was draped with the Royal Standard of Scotland and a wreath of flowers, according to the outlet.
Working members of the royal family are expected to wear their military uniforms at several upcoming events in honor of the late queen's life.
NBC News has learned that Prince Andrew, a non-working member of the royal family, will not wear his military uniform until the end of the memorial service. The Duke of York had his military titles taken away before he settled a sexual abuse case.
The royal residences will be closed until after the queen's funeral, according to a statement from King Charles.
Charles, who was formally sworn in as king during the nation's first televised ascension ceremony in September, will likely hold an official coronation celebration in the coming year.
The article was first published on TODAY.