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Crown Princess Mary and Prince Frederik's adorable twins Prince Vincent and Princess Josephine have been stealing the spotlight at royal occasions since the moment they were born. 

And on Monday, the lovable Danish duo celebrated their seventh birthday.

To mark the occasion, the Danish Monarchy released four new photos of the pair looking all grown up - two official portraits taken on a white background and two more casual snaps from their holiday to Australia in late December.

Here, FEMAIL looks back at some of their most memorable and cheekiest moments over the past seven years and the hilarious snaps that have captured their big personalities. 

Princess Mary and Prince Frederik's adorable twins Prince Vincent and Princess Josephine have been stealing the spotlight at royal occasions since the moment they were born (pictured are their new official portraits to mark their seventh birthday)

To mark the occasion, the Danish Monarchy released four new photos of the pair looking all grown up - two official portraits taken on a white background and two more casual snaps (pictured) from their holiday to Australia in late December

Prince Vincent soaked up the Australian sun in December when the family enjoyed a trip to Princess Mary's home country 

Vincent Frederik Minik Alexander and Josephine Sophia Ivalo Mathilda, the younger siblings of Prince Christian, 12, and Princess Isabella, 10, were born in Copenhagen University Hospital on January 8th, 2011.

Vincent was born 26 minutes before little Josephine and their birth was marked with a 21 gun salute as Prince Frederik fronted national and international press to announce their arrival. 

On April 14 that same year, Princess Mary and Prince Frederik posed for snaps at Holmens Kirke, Denmark, after the twins' christening before heading to Grasten Castle in August for their first summer holiday as a family six. 

Prince Vincent and Prince Josephine were born at Copenhagen University Hospital on January 8th, 2011 and were christened on April 14 at at Holmens Kirke (pictured)

In August that same year they went to Grasten Castle in August for their first summer holiday as a family six - Josephine and Vincent pictured having cuddles with Queen Margrethe Of Denmark and Prince Henrik

When they were seven months old, they joined Princess Mary and Prince Frederik in Hanstholm and are pictured on board the royal yacht "Dannebrog"

They are pictured in November, 2011 at Admiralty House in Sydney, the official residence of the Governor General of Australia

The family have posed for countless snaps at Grasten Castle over the years, with the entire family unit often hosting photocalls in the picturesque castle gardens. 

As the little ones grew up, Princess Mary and Prince Frederik were seen pulling Josephine and Vincent in a wagon, playing hide and seek with them and joining them in games around the grounds. 

In February, 2012, Prince Vincent and Princess Josephine experienced a snow holiday to Verbier, Switzerland, for the first time - Mary and Frederik flying to the resort every year for an annual family trip. 

In February, 2012, Prince Vincent and Princess Josephine experienced a snow holiday to Verbier, Switzerland, for the first time - Mary and Frederik flying to the resort every year for an annual family trip

The balcony of Amalienborg Palace is where Josephine's big personality has truly shone over the years

One of the most amusing snap of the pair is this photo taken in 2013, when the family were watching the Guard change at Grasten Castle after the annual summer photocall

As the little ones grew up, Princess Mary and Prince Frederik were seen pulling Josephine and Vincent in a wagon, playing hide and seek with them at Grasten and joining them in games around the grounds

The first snaps of Josephine and Vincent at the resort were taken when they were just one - the adorable duo dressed in tiny matching snowsuits, mittens and snug beanies. 

As the years went by, the twins became more adventurous and were seen riding snow sleds together and playing with their siblings in the snow. 

The balcony of Amalienborg Palace is where Josephine's big personality has truly shone over the years, with the playful little girl often pulling faces, waving and dancing for the crowds who gather below. 

The family is pictured on holiday in Verbier, Switzerland in 2013

As the years went by, the twins became more adventurous and were seen riding snow sleds together and playing with their siblings in the snow

In 2015, they once again donned matching snowsuits and were all smiles as they played together in the snow 

On the 75th birthday of Queen Margrethe, Josephine was seen climbing the rails of the balcony and playing with her twin 

Vincent, on the other hand, has always remained relatively calm during their public outings and allows his outgoing twin sister to steal the spotlight.

During the family's annual Hubertus Hunting event in 2015 the cheeky princess could be seen from the Eremitage Castle balcony pulling a series of hilarious poses, with Vincent often watching on or, in some cases, somewhat following in his sister's footsteps. 

Despite Vincent's more reserved nature, the duo appear to be the best of friends and no matter where they are, they are often seen exploring, playing and adventuring side by side - whether it's playing with dogs or inventing games in their lavish palace surrounds. 

Vincent has always remained relatively calm during their public outings and allows his outgoing twin sister to steal the spotlight

At the Hubertus Hunting Event in both 2015 (left) and 2017 (right) Josephine was as expressive as ever 

The little princess' adventurous nature has led her into some trouble, however, and in July 2015 Josephine broke her arm in a horse riding lesson and was later seen sporting a blue cast

2017 was a big year for the royal twins, with their first day of day proving to be an exciting one for Josephine and more of an emotional day for Vincent. 

The Australian-born princess and Prince Frederik accompanied them to Tranegård School in Hellerup, Denmark, to begin Grade 0.

But the occasion appeared a little overwhelming for the young prince, whose eyes filled with tears at one point - leading his attentive mother to place her hand lovingly on his head.     

In 2015, Josephine appeared on the balcony the Hubertus Hunting Event and pulled cheeky faces for the cameras 

Princess Josephine has never been afraid to hide her emotions, with the royal blocking her ears at the Nutcracker' opening night in 2016 (left) and yawning widely while at the photocall at Grasten Palace in 2017 (right)

Despite Vincent's more reserved nature, the duo appear to be the best of friends and no matter where they are, they are often seen exploring, playing and adventuring side by side

2017 was a big year for the royal twins, with their first day of day proving to be an exciting one for Josephine and more of an emotional day for Vincent

Meanwhile, his sister appeared to be brimming with confidence - smiling warmly for the cameras as she posed for the waiting media

Meanwhile, his sister appeared to be brimming with confidence - smiling warmly for the cameras as she posed for the waiting media.

While he appeared initially emotional, eventually Prince Vincent broke out into a smile as posed proudly in his school uniform, alongside his family. 

Later that year, the duo accompanied the family to Australia where they enjoyed a relaxing beach holiday in their mother's home country - the pair enjoying beach days at Palm Beach, New South Wales, and visiting Tasmania, Mary's hometown. 

While it has been an exciting and adventure-filled seven years for the young royals, royal watchers and fans are eager to see what 2018 will bring for the dynamic duo.