Crown Princess Mary looked incredible as she stepped out in a glistening midnight blue gown for this special celebration

Crown Princess Mary's midnight blue gown was the perfect look as the royal stepped out in Copenhagen for a special family celebration.

On October 15, the Danish Royal Family looked incredible as they attended a gala dinner for Prince Christian's 18th birthday at the Christiansborg Castle in Copenhagen. The entire Danish Royal Family dressed to the nines to celebrate the young Prince's transition into adulthood.

For this engagement, the Crown Princess looked incredible as she wore an off-the-shoulder blue glittering gown that hugged her figure and cinched in her waist. The look was perfectly on-trend but also had a timeless feel that had a slight 1960s glamour feel. 

To match her blue gown the Princess carried a satin dark blue clutch and a pair of matching triangle-shaped heels to pull the entire look together. Her sash and brooches signalled her place in the Royal Family and her glittering diamond earrings and tiara complemented the glittering sequins on her dress.

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In a sweet sentimental move, the Princess wore the same tiara that she once wore on her wedding day back in 2004, when she married Frederik, Crown Prince of Denmark. This was a beautiful addition to this glittering ensemble and highlighted how versatile this piece of jewellery is. 

The Danish Royals shared images from this event on their social media. One caption revealed part of Prince Christian's speech which was translated from Danish, "I must find my path, even if it leads somewhere known. I have roots in many places in the world, and I enjoy travelling. But home will always be here because I love my country."

Another caption revealed that the evening of festivities ended with His Royal Highness Prince Christian walking on stage and thanking all the guests by saying, "It has been an absolutely unforgettable evening, and I so appreciate you all coming from near and far to celebrate with me!"

Other images from the evening showed that the Prince met with the future monarchs of Norway, Belgium, Sweden and the Netherlands. Although they are all children and young adults at the moment, the photograph was a poignant reminder that they will be the new generation of rulers in years to come.