Prince Nikolai of Denmark Graduated from the prestigious Herlufsholm School in Naestved, Denmark on June 27, 2018

(L-R) Denmark's Prince Nikolai put his arm around his stepmother's back Princess Marie as they posed with his father Prince Joachim during his high school graduation ceremony in Naestved, Denmark

Countess Alexandra of Frederiksborg pictured with sons Prince Nikolai, 18, left, and Felix, 15, right, whom she shares with Prince Joachim. The couple divorced in 2005

Prince Joachim of Denmark was married twice, with his first wife Alexandra, Countess of Frederiksborg left, and second wife Princess Marie of Denmark

The royal couple Prince Joachim and Princess Marie of Denmark both donned sunglasses for the outdoor event

Prince Nikolai of Denmark, 18, second from left, was joined by his parents, Prince Joachim, right, and Countess Alexandra of Frederiksborg, left, and stepmother Princess Marie as he graduated from the prestigious Herlufsholm School in Næstved, Denmark, on Wednesday, June 27, 2018

Denmark's Prince Joachim and Princess Marie arrived at the boarding school for the graduation of Prince Nikolai (not pictured).

Proud father Prince Joachim of Denmark and son Prince Nikolai appeared to share a joke, much to Princess Marie's amusement.

(R-L) Denmark's Prince Joachim along with his wife Princess Marie looked delighted to see his eldest son Prince Nikolai at his graduation

Prince Nikolai of Denmark graduate cap wearing congratulations from his father, mother, and brother on June 26, 2018, on his very last day at Herlufsholm School, on the eve of the graduation ceremony

(2nd-R) Prince Nikolai of Denmark photographed with his mother Countess Alexandra of Frederiksborg, his brother Prince Felix and his father Prince Joachim on his very last day at the Herlufsholm School on the eve of his Graduation ceremony on June 26, 2018

Prince Nikolai of Denmark photographed on the eve of his graduation ceremony.

Countess Alexandra of Frederiksborg at the funeral of Prince Henrik of Denmark on February 20, 2018, in Copenhagen.

Countess Alexandra of Frederiksborg at the funeral of Prince Henrik of Denmark on February 20, 2018, in Copenhagen.

Countess Alexandra of Frederiksborg at the funeral of Prince Henrik of Denmark on February 20, 2018, in Copenhagen.

Prince Nikolai of Denmark on the presence of his father Prince Joachim, his mother Countess Alexandra of Frederiksborg (white dress) and her stepmother Princess Marie of Denmark (black dress) at his graduation ceremony at the private school of Herlufsholm.

(R-L) Prince Joachim of Denmark with his wife Princess Marie of Denmark and his ex-wife Countess Alexandra of Frederiksborg pose for a photo during High School graduation ceremony of his eldest son Prince Nikolai (not pictured).

Countess Alexandra of Frederiksborg left, and Princess Marie of Denmark, 2nd-right, is understood to enjoy a good relationship pictured with Prince Joachim of Denmark on right, as they attend the graduation ceremony of Prince Nikolai not pictured.

(L-R) Countess Alexandra of Frederiksborg with Princess Marie of Denmark and Prince Joachim of Denmark as they attend the graduation ceremony at the private school of Herlufsholm in Denmark

Countess Alexandra of Frederiksborg with older son Prince Nikolai of Denmark at his graduation ceremony at the private school of Herlufsholm.

(C) Countess Alexandra of Frederiksborg in a pretty pink and black pattern white dress as she attends her eldest son high school graduation in Naestved, Denmark

Countess Alexandra of Frederiksborg with his eldest son Prince Nikolai of Denmark during his high school graduation ceremony in Naestved, Denmark

Prince Nikolai of Denmark on the presence of his father Prince Joachim, his mother Countess Alexandra of Frederiksborg (white dress) and her stepmother Princess Marie of Denmark (black dress) at his graduation ceremony at the private school of Herlufsholm.

(R-L) Prince Joachim of Denmark with his wife Princess Marie of Denmark and his ex-wife Countess Alexandra of Frederiksborg pose for a photo during High School graduation ceremony of his eldest son Prince Nikolai (not pictured).

(L-R) Princess Marie of Denmark with husband Prince Joachim of Denmark, who greets his ex-wife Countess Alexandra of Frederiksborg during Prince Nikolia of Denmark's high school graduation ceremony in Naestved, Denmark

Countess Alexandra of Frederiksborg opted for a pretty pink and black pattern white dress as she attends her eldest son high school graduation in Naestved, Denmark

Prince Joachim of Denmark with his current wife Princess Marie of Denmark (R) and his ex-wife Countess Alexandra of Fredirksborg (L)  posed for a photo at his eldest son high school graduation in Naestved, Denmark

Proud mother Countess Alexandra of Frederiksborg with older son Prince Nikolai of Denmark at his graduation ceremony at the private school of Herlufsholm.

Prince Nikolai of Denmark on the presence of his father Prince Joachim, his mother Countess Alexandra of Frederiksborg (white dress) and her stepmother Princess Marie of Denmark (black dress) at his graduation ceremony at the private school of Herlufsholm.

Prince Joachim of Denmark with his current wife Princess Marie of Denmark (R) and his ex-wife Countess Alexandra of Fredirksborg (L)  posed for a photo at his eldest son high school graduation in Naestved, Denmark

(R-L) Prince Joachim of Denmark with his wife Princess Marie of Denmark and his ex-wife Countess Alexandra of Frederiksborg pose for a photo during High School graduation ceremony of his eldest son Prince Nikolai (not pictured).

Prince Joachim of Denmark with his current wife Princess Marie of Denmark (R) and his ex-wife Countess Alexandra of Fredirksborg (L)  posed for a photo at his eldest son high school graduation in Naestved, Denmark

Proud mother Countess Alexandra of Frederiksborg with older son Prince Nikolai of Denmark at his graduation ceremony at the private school of Herlufsholm.

(C) Countess Alexandra of Frederiksborg in a pretty pink and black pattern white dress as she attends her eldest son high school graduation in Naestved, Denmark

Prince Nikolai of Denmark, second from left, was joined by his parents, Prince Joachim, right, and Countess Alexandra of Frederiksborg, left, and stepmother Princess Marie of Denmark as he graduated from the prestigious Herlufsholm School in in Naestved, Denmark, on June 27, 2018

Countess Alexandra of Frederiksborg pose for a photo during her eldest son graduation ceremony from the prestigious Herlufsholm School in in Naestved, Denmark

(L-R) Countess Alexandra of Frederiksborg and Princess Marie of Denmark hugs as they greet each other as Prince Joachim of Denmark looks as they attend Prince Nikolai's graduation ceremony from the prestigious Herlufsholm School in in Naestved, Denmark

Prince Joachim of Denmark with his current wife Princess Marie of Denmark (R) and his ex-wife Countess Alexandra of Fredirksborg (L)  posed for a photo at his eldest son graduation from the prestigious Herlufsholm School in in Naestved, Denmark

(C) Countess Alexandra of Frederiksborg in a pretty pink and black pattern white dress as she attends her eldest son high school graduation in Naestved, Denmark

Countess Alexandra of Frederiksborg in Copenhagen on May 27, 2018.

Prince Nikolai of Denmark and his mother Countess Alexandra of Frederiksborg on August 28, 2017 in Copenhagen for Prince Nikolai's 18th birthday dinner.

Prince Joachim of Denmark, Prince Nikolai, Countess Alexandra of Frederiksborg and Prince Felix on August 28, 2017 in Copenhagen for Prince Nikolai's 18th birthday dinner.

(L-R) Princess Marie of Denmark, Prince Joachim of Denmark, Prince Henrik of Denmark, Princess Athena of Denmark, Prince Nikolai of Denmark, Countess Alexandra of Frederiksborg and Prince Felix of Denmark attend the 18th birthday celebration of Prince Nikolai at royal ship Dannebrog on August 28, 2017 in Copenhagen, Denmark.

(L-R) Princess Marie of Denmark, Prince Joachim of Denmark, Prince Henrik of Denmark, Princess Athena of Denmark, Prince Nikolai of Denmark, Countess Alexandra of Frederiksborg and Prince Felix of Denmark attend the 18th birthday celebration of Prince Nikolai at royal ship Dannebrog on August 28, 2017 in Copenhagen, Denmark.

(L-R) Princess Marie of Denmark, Prince Joachim of Denmark, Prince Henrik of Denmark, Princess Athena of Denmark, Prince Nikolai of Denmark, Countess Alexandra of Frederiksborg and Prince Felix of Denmark attend the 18th birthday celebration of Prince Nikolai at royal ship Dannebrog on August 28, 2017 in Copenhagen, Denmark.

(L-R) Princess Marie of Denmark, Prince Joachim of Denmark, Prince Henrik of Denmark, Princess Athena of Denmark, Prince Nikolai of Denmark, Countess Alexandra of Frederiksborg and Prince Felix of Denmark attend the 18th birthday celebration of Prince Nikolai at royal ship Dannebrog on August 28, 2017 in Copenhagen, Denmark.

(L-R) Prince Nikolai of Denmark his mother Countess Alexandra of Frederiksborg and younger brother Prince Felix of Denmark during his 18th birthday celebration at royal ship Dannebrog on August 28, 2017 in Copenhagen, Denmark.

The Royal Family of Denmark attended the traditional New Year's reception at Amalienborg Palace in Copenhagen on January 1, 2018.

Crown Princess Mary of Denmark looked absolutely breathtaking in a crimsom coloured gown and a glittering tiara as she attended a traditional New Year's reception in Copenhagen on Monday evening - 1 January 2018

Crown Princess Mary wore a sparkling Ruby Parure Tiara which dates back two centuries and has been in the Danish royal family since 1869, as she attended the traditional New Year's reception at Amalienborg Palace in Copenhagen

Crown Princess Mary of Denmark looked radiant in a satin red dress, which nipped in at the waist and featured a sweetheart neckline. She completed her glamorous look with an exquisite Ruby Parure tiara and matching pair of diamond and ruby earrings, during the traditional New Year's reception at Amalienborg Palace on January 1, 2018

Crown Princess Mary of Denmark turned heads, stunning in a shoulderless crimson gown. The Crown Princess also added a pair of diamond drop earrings and was seen sporting a brooch depicting an image of her mother-in-law, the Danish Queen, as she attends traditional New Year's reception in Copenhagen

Denmark's Crown Pricess Mary, stunning in a shoulderless crimson gown, featured short sleeves and was cinched in at the waist. With her brown hair tied into a regal-looking up-do, she added a sparkling silver Ruby Parure tiara which she is frequently seen wearing at royal events. Meanwhile, her husband Crown Prince Frederik put on a dapper display in traditional military regalia, as they arrived for the traditional New Year's reception in Copenhagen.

Crown Princess Mary appears absolutely breathtaking in a crimson gown and sparkling Ruby Parure tiara as she attends traditional New Year's reception in Copenhagen alongside her dapper husband Crown Prince Frederik of Denmark

Crown Prince Frederik and Crown Princess Mary of Denmark looked picture-perfect as they arrived for the traditional New Year's reception at Amalienborg Palace in Copenhagen

Danish Crown Princess Mary also wore the Order of the Elephant on a chain-link collar, known as The Knight's Day, as she attends traditional New Year's reception in Copenhagen

Crown Princess Mary of Denmark put on a regal display as she attended the traditional New Year's reception at Amalienborg Palace in Copenhagen on 1 January 2018. The New Year's reception is a centuries-old tradition held for members of the Danish parliament, top officials and court management

Crown Princess Mary of Denmark looked simply breathtaking as she joined husband Crown Prince Frederik of Denmark, at the event, which was hosted by his mother, Queen Margrethe.

Denmark's Crown Princess Mary, looked radiant in a satin red dress, which nipped in at the waist and featured a sweetheart neckline. She completed her glamorous look with an exquisite Ruby Parure tiara and matching pair of diamond and ruby earrings, who joined her husband Crown Prince Frederik, for the traditional New Year's reception at Amalienborg Palace on January 1, 2018

Denmark's Princess Marie, who arrived on the arm of her husband Princess Joachim, was just as stunning in a full-length white gown that featured a pristine overlay. She added a pop of color with a gold clutch, a Diamond Floral Tiara and drop diamond earrings, as they attends traditional New Year's reception in Copenhagen.

Princess Marie of Denmark looked simply stunning in a full-length white gown that featured a pristine overlay. She added a pop of color with a gold clutch, a Diamond Floral Tiara and drop diamond earrings, arrived for the traditional New Year's reception in Copenhagen

Crown Princess Mary of Denmark regal in red, looked stunning in a shoulderless gown, a glittering Ruby Parure Tiara and matching pair of diamond and ruby earrings, as she attends traditional New Year's reception in Copenhagen on 1 January 2018

Crown Princess Mary of Denmark appears absolutely breathtaking in a crimson gown and sparkling Ruby Parure Tiara at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Crown Princess Mary of Denmark at the Christian VII Palace for traditional New Year's reception in Copenhagen on January 1, 2018

Crown Princess Mary of Denmark appears absolutely breathtaking in a crimson gown and sparkling Ruby Parure Tiara as she attends traditional New Year's reception in Copenhagen alongside Crown Prince Frederik who is dapper in traditional military regalia.

Queen Margrethe II of Denmark arrives at the Christian VII Palace in Copenhagen on January 1, 2018 for the first New Year banquet.

Queen Margrethe II of Denmark worn an emerald green gown with matching necklace, earrings and Emerald Parure Tiara, completing the look with a fur stole, arrives at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Queen Margrethe II of Denmark hosts an annual New Year's banquet in the Danish capital. She wore a dashing emerald green lace gown with matching Crown Jewels Necklace, earrings and Emerald Parure Tiara, completing the look with a fur stole.

Princess Marie of Denmark, who arrived on the arm of her husband Princess Joachim of Denmark, was just as stunning in a full-length white gown that featured a pristine overlay. She added a pop of color with a gold clutch, a diamond floral tiara and drop diamond earrings.

Princess Marie of Denmark arrives at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Crown Princess Mary of Denmark looked absolutely breathtaking in a crimson colored gown and a glittering tiara as she attended a traditional New Year's reception in Copenhagen on January 1, 2018

Crown Princess Mary of Denmark looked radiant in a satin red dress, completed her glamorous look with an exquisite Ruby Parure Tiara and matching pair of diamond and ruby earrings, she also wore the Order of the Elephant on a chain-link collar as she attends traditional New Year's reception in Copenhagen

Princess Marie of Denmark, stunning in a full-length white gown that featured a pristine overlay. She added a pop of colour with a gold clutch, a Diamond Floral Tiara and drop diamond earrings, as she attends traditional New Year's reception in Copenhagen alongside with her husband Princess Joachim of Denmark.

Crown Princess Mary looked simply breathtaking as she joined her husband Crown Prince Frederik of Denmark, at the event, which was hosted by his mother, Queen Margrethe II at the Amalienborg Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Crown Prince Frederik and Crown Princess Mary of Denmark arrived at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Queen Margrethe II of Denmark arrived at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018

Crown Princess Mary of Denmark stunning in a shoulderless crimson gown which nipped in at the waist and featured a sweetheart neckline, top off with a glittering Ruby Parure tiara and a matching pair of diamond and ruby earrings, as she attended a traditional New Year's reception in Copenhagen on January 1, 2018

Princess Marie of Denmark, looks stunning in a full-length white gown that featured a pristine overlay and a glittering Diamond Floral tiara and drop diamond earrings, as she attended the traditional New Year's reception at Amalienborg Palace in Copenhagen on January 1, 2017.

Princess Marie and Prince Joachim of Denmark arrived at the Christian VII Palace in Copenhagen for the first New Year banquet on January 1, 2018.

Crown Princess Mary of Denmark put on a regal display as she attended the traditional New Year's reception at Amalienborg Palace in Copenhagen as she joined her husband Crown Prince Frederik of Denmark at the event.