Princess Isabella of Denmark to receive major honour as 18th birthday marked with $70k celebration

The Danish royals are preparing for a lavish birthday celebration – and no expense is being spared.

King Frederik and Queen Mary's eldest daughter Princess Isabella is set to mark her 18th birthday on April 21, with events being planned the week before to avoid an Easter clash.

The first: a soiree at Aarhus City Hall a week before the milestone on April 11.

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This event is shaping up to be an extraordinary night and will include a fashion show, musical performances and dancers.

It will be attended by 300 people, including the Danish royal family and attendees from local youth organisations and education programs.

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Many will be given the opportunity to showcase their talent in music, sport, food and design.

The estimated cost of the event is 290,000 kroner ($67,831.87).

A birthday gift for Princess Isabella is also being organised and is set to cost 10,000 kroner ($2338.92), but details of what exactly she can expect are being kept under wraps.

A second event is also being planned for Isabella on April 15 with a special performance at The Royal Danish Theatre in Copenhagen.

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"The birthday will be marked officially on 11 and 15 April in Aarhus and Copenhagen, respectively, with celebrations that pay tribute to the communities of the young generation with culture, creativity, sustainability and volunteerism as the principal elements," the royal household confirmed of the celebrations.

It will be broadcast by the Danish Broadcasting Corporation, meaning that viewers can tune in from home.

The royal will also likely enjoy a private celebration on her birthday on April 21 with family, King Frederik and Queen Mary, Crown Prince Christian, 19, Prince Vincent and Princess Josephine, 14, and Queen Margrethe, 84.

The milestone birthday will also see the princess receive a major honour from her father King Frederik X: the Order of the Elephant.

Isabella will wear the Order of the Elephant insignia when she attends a performance at the Royal Danish Theatre, in Copenhagen, on April 15.

Princess Isabella completes her secondary school education at the end of this year, though her future plans are yet to be shared publicly.

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