Queen Elizabeth will make her final journey to Windsor Castle for burial at St George's Chapel following her state funeral service at Westminster Abbey.
The late monarch will be laid to rest alongside her parents, King George VI and the Queen Mother.
Prince Philip who passed away last April and currently rests in the Royal Vault, will also be moved to St George's Chapel after the Queen's funeral
The chapel also houses a casket with Princess Margaret's ashes. The Queen's younger sister passed away 20 years ago aged 71.
She chose to be cremated instead of buried - here's why.
Why was Princess Margaret cremated?
Princess Margaret, who was four years younger than her sister Queen Elizabeth II, died in February 2002.
A statement revealed that she had died in her sleep after experiencing cardiac problems following a stroke the day before.
It was Princess Margaret's own decision to be cremated, becoming the first royal in 60 years to be cremated in over 60 years.
The Princess had intended to be buried at Frogmore at Windsor Home Park. However, according to her close friend and lady in waiting Lady Glenconner, the Princess found Frogmore "very gloomy."
She also wished to be laid to rest with her father, who is interned in the King George VI Memorial Chapel at St George’s Chapel.
It's thought that she decided to be cremated since there was no room for a conventional burial near her father.
Where was Princess Margaret cremated?
After a private funeral service at St George’s Chapel at Windsor, Princess Margaret's coffin was transported to the Slough crematorium. which is a three-and-a-half-mile journey from the chapel.
The cremation cost £280 according to the Daily Mail, and was attended by members of her staff, her former private secretary Lord Luce and Lord Chamberlain, who represented the Queen.
The Princess reportedly reportedly left “closely scripted instructions” for the plans for her funeral which asked that her family not attend her cremation.
Follow updates on the Queen's funeral procession on our live blog here.
