Inside Princess Isabella's very lavish 18th birthday party (2025)

With the birthday girl's glittering ballgown, award-worthy performances, and a guest list spanning one thousand young people, Princess Isabella of Denmark's 18th bash was one to remember.

Denmark's royal family and it-girls arrived at the lavish Royal Theatre's Old Stage in Copenhagen yesterday evening to mark Queen Mary and King Frederik X's second child's coming of age ahead of her birthday on April 21.

The official event saw the country's elite gather at the venue alongside one thousand of Denmark's young people, who secured tickets their tickets via a lottery, for a series of breathtaking performances by both established artists and emerging talents.

Yesterday was the second official event held in honour of Isabella's birthday, with the first party held at Aarhus Hall on 11 April, which, according to Hello, cost a staggering £32,542, including security, catering, and entertainment, but not the cost of her £1,000 mystery birthday gift.

The birthday girl arrived in style alongside her parents and siblings, Crown Prince Christian, 19, Princess Josephine, 14, and Prince Vincent, also 14, before taking to the red carpet and posing up a storm.

While Danish royalty, including Queen Margrethe, who marks her 85th birthday today, assembled on the carpet in sparkling gowns, other invitees gathered on the theatre's steps to catch a glimpse at the star-studded arrivals.

Once inside, guests wandered through chandelier-lit corridors before finding their place at the theatre in preparation for Their Majesties and Princess Isabella's entrance.

Princess Isabella of Denmark marked her upcoming 18th birthday with a lavish celebration atthe Royal Theatre's Old Stage in Copenhagen yesterday evening

The birthday girl took her place in the Royal Gallery between Mary, 53, and Frederik, 56, on a raised balcony before the evening's entertainment commenced.

'The evening's birthday performance on the Royal Theatre's Old Stage began when Their Majesties the King and Queen and Her Royal Highness Princess Isabella entered the Royal Gallery,' the royal household wrote on Instagram.

'The Royal Opera Choir then began the performance with King Christian, which was sung together with the evening's guests.

'Among the audience are over a thousand young people from all over the kingdom, invited to participate in the celebration of the Princess's coming of age.

'The program ranges from classical opera and ballet to modern dance, musicals, and pop music.

'All of it is performed by both established artists and young talents. The evening is tied together by actress Julie Rudbæk as emcee and the Royal Danish Orchestra under the direction of Thomas Søndergård.'

Pictured:Denmark's Princess Isabella, King Frederik X, Queen Mary, Crown Prince Christian, Princess Josephine, and Prince Vincent at Princess Isabella's 18th birthday

Count Nikolai of Monzepat shared a behind-the-scenes glimpse of himself preparing for the party on Instagram

Nikolai got ready for Isabella's birthday bash with his younger brotherCount Felix of Monzepat, 22

Guests gathered outside the lavish Copenhagen theatre as the royal family arrived on the red carpet

Isabella, sat between her parents, enjoyed the performances while sat on a balcony above the stage

Nikolai shared his final look for the party on Instagram with the caption: 'From this week's birthday celebrations'

Christian and twins Josephine and Vincent sat separately to Isabella and Their Majesties, allowing the attention to remain solely on the birthday girl.

'The birthday performance on the occasion of Her Royal Highness Princess Isabella's 18th birthday consisted of a varied program, where the theme of young emotions served as the common thread throughout the evening and was expressed in both repertoire and artistic choices,' the royal household wrote on Instagram.

'The first part of the evening began with 'King Christian' performed by the Royal Danish Opera Choir, followed by scenes from Molière's Don Juan, excerpts from West Side Story and arias by Puccini and Rossini.

'This was followed by musical performances by Medina and classical ballet with a pas de deux from Don Quixote, performed by the Royal Danish Ballet.

'After the break, the performance continued with UngKlang's new interpretation of the Dance Orchestra's song Regndans, modern dance from Kompagni B and Uppercut Danseteater as well as musical and choreography to music by Scarlet Pleasure.

'The evening was brought together by actress Julie Rudbæk as emcee and accompanied by the Royal Danish Orchestra under the direction of conductor Thomas Søndergård.'

Elsewhere, Isabella's very dashing cousins, Count Nikolai, 25, and Count Felix of Monzepat, 22, the sons of Prince Joachim, were in attendance, wearing velvet suit jackets with smart bow-ties.

Tensions had risen between the family in 2023, after Queen Margrethestripped Prince Joachim's four children - Nikolai, Felix, Henrik and Athena, of their titles - but, as they beamed on arrival, any feelings of resentment appeared long gone.

The 25-year-old royal, who is the eldest grandchild of Queen Margrethe II and Prince Henrik, looed dapper in a tux

Nikolai shared the products he used to get ready for the celebration, including an Armani fragrance

Pictured:Count Nikolai andCount Felix of Monpezat preparing for Isabella's birthday celebrations

1000 guests entered the chandelier-lit venue to enjoy an evening of entertainment in honour of Isabella's birthday

At the time, Margrethe insisted the move would be 'good for them in their future' and allow the children - who have maintained their positions in the line of succession - to 'shape their own lives without being limited by the special considerations and duties' that a formal affiliation with the Danish Royal Family involves.

But Prince Joachim publicly spoke out against his mother's decision in the days that followed - claiming that his children had been 'harmed' in the process.

Nikolai has since launched his own Instagram account to promote his modelling career - and has seldom been seen with his cousins and aunt since the announcement.

Last weekend, Princess Isabella delivered her first solo address at a celebration in honour of her coming of age.

The Princess, who officially turns 18 over Easter on April 21, was joined by her parents and younger twin siblings Princess Josephine and Prince Vincent at the city hall in Aarhus to attend the first of two major public birthday celebrations.

Much to the delight of royal fans, the Danish princess took to the podium at the conclusion of the formal proceedings to deliver her first official address as a royal.

And surprisingly, Princess Isabella chose to dive into her debut speech with a cheeky and self-deprecating joke.

Counts Nikolai, 24, and Felix, 22, were as dashing as ever at Princess Isabella's 18th birthday celebrations

Queen Mary admired her eldest daughter as they posed for photographs outside the lavish venue

'Almost four years ago I found out that your words can be overheard when you least expect it,' Princess Isabella said, as the room erupted in laughter.

'Today I have no doubt that the microphone is on.'

The bold comment referenced a terse moment in 2021 when Princess Isabella was caught on camera saying the words 'are you completely confused' to her mother, Queen Mary.

The teenage princess' frustrated statement was made following her brother Prince Christian's confirmation as the royal family tried trying to arrange themselves for a family photo outside the church -with the candid mother-daughter exchange captured in a viral video.

According to local Danish publication Billed Bladet, the unexpected opening line in Princess Isabella's speech instantly captured the audience's attention.

Danish publication BT's entertainment editor Fie West agreed, praising the young royal for making such a bold opening statement.

'Princess Isabella shows great initiative by starting her very first official speech with a joke,' Fie said.

'She speaks into something that many Danes remember and have brought a smile to their faces, and it is extremely charming that she displays self-irony,' the entertainment editor added.

Count Nikolai gave a friendly wave to crowds as he arrived at the eventat the Old Stage in the Royal Danish Theatre in Copenhagen

Princess Isabella beamed as she received a bouquet of bright pink flowers before heading into the event

Mary was elegant as ever in an off-the-shoulder black and silver ensemble, with a glittering skirt and brooch catching the eye

After the unexpected introduction, Princess Isabella went on to thank all the attendees at the special birthday celebration, while also highlighting her own personal connection to the Danish city of Aarhus.

'Dear mayor, dear Aarhus, dear everyone who has come today. Thank you so much for a very special birthday celebration,' she said.

'It makes me really happy to be celebrated in a city that has great significance for me and my family.'

'Here I have celebrated Christmas, Easter, walked by the water and in the garden and enjoyed myself in the old town since I was little. I have many good memories in Aarhus and today I have another one.'

The lavish birthday event, which was projected to cost upwards of 290,000 Norwegian Kroner, equivalent to about AU$70,000, featured an extravaganza of performances including dance and music displays and even a fashion show.

The young royal was also presented with three elaborate birthday cakes made by students studying at Aarhus Tech.

The Princess made sure to give a special 'thank you' to all the talented and hard-working people who had contributed to the occasion.

The daughter of Queen Mary, 53, and King Frederik, 56, also thanked the crowd for the 'nice piece of jewellery', which according to the pre-party itemised budget was estimated to be worth 10,000 kroner, equivalent to around AU$2400.

The Danish royals attended the birthday performance at the Old Stage at the Royal Danish Theatre

The birthday girl looked stunning in a sparkling navy dress, which featured an elegant puffed skirt

King Frederik and Queen Mary at a birthday performance at the Old Stage in the Royal Danish Theatre in Copenhagen

The royals waved to crowds after attending the performance, which comes ahead of Isabella's 18th birthday

The Princess was also touched by the sentimental gift of a book filled with personalised greetings and well-wishes.

The royal concluded her inaugural speech by saying: 'That you have chosen to celebrate me and that so many have come makes me happy and touched. You should know that it means a lot to me. Thank you very much.'

This celebration is the first of two events arranged by the Royal House ahead of Princess Isabella turning 18.

Next up, the princess will be celebrated with a birthday performance on The Old Stage at the Royal Theatre in Copenhagen.

The Princess and the royal family have invited over 1000 young people from across Denmark to join them to watch the special performance being held this coming Tuesday.

A royal household statement reads: 'The Royal House of Denmark, in cooperation with The Royal Danish Theatre, invites the young generation to entertaining, exciting and varied performing arts that are both classical and modern.'

The performance is also set to be broadcast live on local television network DR, so all Danes can watch from their living rooms.

The upcoming milestone birthday will also see Princess Isabella receive a major honour from her father King Frederik, known as the Order of the Elephant.

The Danish royal household released new portraits of Princess Isabella to mark her coming of age

Although she technically won't receive the Order of the Elephant until she turns 18 next week, it is expected that Isabella will wear the insignia for the first time at the Royal Danish Theatre performance.

The royal household have also recently released new birthday portraits of Princess Isabella to mark her coming of age.

The royal's 18th birthday pictures were taken by photographer Steen Evald in Frederik VIII's Palace at Amalienborg.

On her actual birthday on 21 April,Princess Isabella is expected to enjoy a private birthday celebration with family and loved ones.

From this year onwards, Princess Isabella will also have her birthday added into the rotation of annual flag days, which are the official dates when the national flag is traditionally flown.

Inside Princess Isabella's very lavish 18th birthday party (2025)

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