Crown Princess Mary and her husband Crown Prince Frederik of Denmark and their four children at Sydney's Palm Beach on December 27, 2017

Despite living in Denmark, it didn't take long for Crown Princess Mary to acclimatise to the Australian conditions, looking confident in the surf

(L) Crown Princess Mary of Denmark kept things casual as she mingled with fellow swimmers

Crown Princess Mary of Denmark, who is known as one of the world's most fashion-forward Royals- rocked the swimsuit with aplomb

Crown Princess Mary of Denmark was seen tenderly hugging her daughter Princess Isabella who was drying off after a swim.

Crown Princess Mary of Denmark looked completely in her element as she enjoyed a swim in the surf at Sydney's Palm Beach last week in December 2017

Crown Princess Mary was seen drying off after the dip, the Crown Princess shielded her eyes with a large pair of sunglasses

(L) Crown Princess Mary of Denmark, was seen chatting animatedly with fellow beach goers as she kept a close eye on her children splashing about in the water.

Crown Princess Mary of Denmark was seen sporting a huge grin on her face as she gave her youngest son Prince Vincent a piggy-back across the sand at Sydney's Palm Beach

Crown Princess Mary of Denmark, simply sensational, showed off her athletic figure in blue bathers during a day out with their adorable children at Sydney's Palm Beach

Danish Crown Princess Mary, the doting mother was seen lifting up her youngest son Prince Vincent and giving him a piggy back across the sand at Sydney's Palm Beach

Keeping his fair European skin protected from the harsh Australian sun, the Crown Prince Frederik of Denmark wore a long-sleeved rash shirt.

Crown Princess Mary of Denmark and her family departed Sydney shortly before Christmas, flying further south to spend the festive occasion in her home state of Tasmania

Knowing well about the dangers of the harsh Australian sun, the Danish Crown Princess Mary donned a sensible black rash shirt as she splashed around in the shallows

The striking blue one-piece was strapless on the right hand side, giving a glimpse of the Crown Princess Mary's bare shoulder, as she made her way out of the water and across the sand, the swimsuit clung to Crown Princess Mary's frame, highlighting her athletic physique.

Crown Princess Mary of Denmark, looking super stylish in her swimwear, she sported a one-shoulder swimsuit by Melissa Odabash, during her festive break in Australia and was spotted with her family on Sydney's Palm Beach.

Danish Crown Princess Mary donned a sensible black rash shirt as she splashed around in the shallows with her husband and children.

Crown Princess Mary of Denmark donned a sensible black rash shirt as she splashed around in the shallows with her children at Palm Beach in Australia.

Crown Princess Mary of Denmark was seen beaming as she took to the water on Sydney's Palm Beach, showing off her incredibly fit physique in a stylish one-shoulder blue swimsuit by Melissa Odabash.

Crown Princess Mary looked just like any other doting mother as she spent time with husband Crown Prince Frederik and their four children at Sydney's Palm Beach last week, pictured, gave her youngest son Prince Vincent a piggy-back across the sand.

Crown Prince Frederik of Denmark and oldest son Prince Christian both rocked the same floral board shorts during their family outing at Sydney's Palm Beach.

Denmark's Crown Princess Mary chatting with her 10-year-old daughter Princess Isabella after a swim in the sea of Palm Beach in Sydney, Australia.

Crown Princess Mary of Denmark wearing a demure black one-piece swimsuit as she enjoyed the seaside outing the second time at Palm Beach in Sydney Australia

The fashionable Crown Princess Mary looked typically stylish, opting for a loose-fitting sundress over the top of a blue swimsuit. While young Prince Vincent was swaddled in a white towel, as he was carried along by his doting mother.

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.