Crown Princess Mary of Denmark looks incredibly fit as she competes in a mile of Royal Run

Crown Princess Mary of Denmark looked incredibly fit as she competed at the Royal Run in Kolding, Denmark on Monday.

Australian-born Royal, 50, donned form-fitting sportswear as she ran a mile [1.6 kilometres] and mingled with the crowd.

Princess Mary added gray sneakers and a matching cap to the look and swept her brunette locks into an effortless ponytail.

She also appeared to be wearing minimal makeup and drew attention to a glowing face.

The event’s official website states that you don’t have to be a ‘crown princess or novice’ to participate in the community event, all fitness levels are welcome.

The sighting comes after Princess Mary attended the wedding of Prince Gustav of Sayn-Wittgenstein-Berleburg and Carina Axelsson in a floral Zimmermann number, much to the delight of her Australian fans.

The Royal stood next to her husband Prince Frederik at the wedding on June 4 alongside Prince Joachim, Princess Marie, Princess Benedikte, Princess Alexandra, Prince Hubertus and Princess Kelly.

Princess Mary opted for the Zimmermann flower-eyed dress with pale pink shoes for the occasion, her hair falling back in a charming topknot.

“Mary, I’m impressed, she’s by far the best dressed Royal ever, I want everything she wears,” wrote one fan of the look.

Princess Mary – born Mary Elizabeth Donaldson – is one of the most respected women on the international scene.

During the 2000 Olympics, she met her husband, Crown Prince Frederik of Denmark, by chance at the Sydney pub, the Slip Inn.

After their meeting, Frederik – who was in Australia supporting the Danish Olympic sailing team – asked Mary for her phone number and a romance blossomed.

“The first time we met, we shook hands. I didn’t know he was the Prince of Denmark. Half an hour later, someone came up to me and said, “Do you know who these people are?” Mary revealed in an interview about meeting the heir to the Danish throne.

They had a long-distance relationship for a year, with Frederik making secret trips to Down Under before Mary moved to Denmark in 2001 to study Danish language at the Studieskolen in Copenhagen.

In early 2003, Frederik’s mother, Queen Margrethe, publicly acknowledged the relationship and the couple announced their engagement at Amalienborg Castle later that year on October 8.

Frederik and Mary were married in Copenhagen Cathedral on May 14, 2004, with the newly minted Crown Princess opting for a beautiful gown by Danish designer Uffer Frank and a veil first used by Crown Princess Margaret of Sweden in 1905.

Their first child, Prince Christian Valdemar Henri John, was born on October 15, 2005; Princess Isabella Henrietta Ingrid Margrethe followed on April 21, 2007.

Almost four years later, Mary and Frederik welcomed twins, Princess Josephine Sophia Ivalo Mathilda and Prince Vincent Frederik Minik Alexander at the Rigshospitalet in Copenhagen on January 8, 2011.