The document was signed back on March 14 of this year and has been released to the public so we can "OooOooOo" and "AhhHhHhh" at it. It's been the emblem since 1903 and it's included in this historic document around another red rose, which has been the national flower of the United States since 1986.
It required descendants of King George II to get the sovereign's consent before they Wednesday, otherwise their marriages would be invalid. The first six people in line to the British throne must seek the Queen's formal approval to marry, without which Prince Harry - the sixth in line - would have been disqualified from the line of succession.
The Instrument of Consent is drafted by the Crown Office and illuminated on vellum, a material reserved only for important state documents.
"Now know ye that we have consented and do by these presents signify our consent to the contracting of matrimony between our most dearly beloved grandson Prince Henry Charles Albert David of Wales KCVO and Rachel Meghan Markle", the instrument reads. For this document, revealed with just under a week to go until the Royal Wedding, underlines the importance of the Commonwealth to both the Monarch and the couple whose marriage gets the ultimate go ahead with this headline-making piece of vellum.
She has given her approval to the marriage in an Instrument of Consent, which is a hand-written document that will be given to the loved-up couple after they tie the knot. Beneath the Label are olive branches, adopted from the Great Seal of the United States.More news: Trump Tirade Is Culmination of Immigration Frustration
Forecasters are predicting highs of around 18 degrees Celsius (64 F) for the royal wedding.
If ever a bride can expect perfection on her wedding day, it's Meghan Markle.
Prince Harry, 33, proposed to former American actress Meghan, 36, in November, getting down on one knee at his home, Nottingham Cottage, at Kensington Palace.
But the designer will not be revealed until the royal bride-to-be steps out of her wedding auto on arrival at St George's Chapel, Windsor Castle, where she is marrying Harry at noon on Saturday. More than 600 guests are expected to attend the ceremony, before a more private and intimate reception that evening.