Why future Queen Mary and King Frederik won't get a Coronation this weekend

Crown Princess Mary is just days away now from becoming the Queen of Denmark with her sister Jane travelling to Copenhagen to be by her side.

The 51-year-old will be Europe's first Australian-born Queen, with current ruler, Queen Margrethe the first in the Danish Royal family to abdicate the throne in more than 900 years.

But similar to the Coronation of Britain's King Charles III last year, Mary and her husband Frederik's crowning as the new King and Queen will be a slimmed down event.

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In fact the event, which will kick off on January 14 at 11.35pm (AEDT) is not a Coronation at all, according to historian Sebastian Olden-Jorgensen.

"Since the introduction of a liberal constitution in 1849, our Kings and the present Queen have only been proclaimed after swearing an oath and signing the Constitution," he told Today.

"So that's the simple, minimalist style of Denmark, Mary's father will stay in Australia for health reasons and Frederik's brother will be there but the court has not shared anything further about other royalty so it seems to be a selected company."

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Sebastian said the Danish people seem to be in good spirits about Mary becoming Queen and they have taken kindly to her inclusion in the Danish Royal family since she and Frederik wed 20 years ago.

"They are rather altruistic, they love her and are very impressed by her," he said.

"Her ability to adapt and to develop a public persona that is dignified, that is serious, that has reinvented the social side of the monarchy with initiatives in support of bullied children, combating domestic violence and fighting isolation and loneliness."

See what else Sebastian had to say in the video above