Prince Harry reportedly refers to Duchess Catherine as the big sister he never had.

Prince Harry

Prince Harry

The 32-year-old royal has developed a close bond with the Duchess, Prince William's wife, over the years, and he's even leaned on her for emotional support during particularly stressful moments in his life.

Prince Harry also visits the royal couple at their apartment at Kensington Palace, where the Duchess is known to cook for him, according to Newsweek magazine.

Meanwhile, Prince Harry recently admitted he wants to keep the "magic" of the royal family alive.

The flame-haired royal revealed that he, his brother Prince William and sister-in-law Duchess Catherine are keen to "modernise" the monarchy.

However, Prince Harry stressed that the popular trio are also keen to keep the core values of the institution in place.

He said: "It's a tricky balancing act [between royals seeming to be like normal people]. We don't want to dilute the magic ...The British public and the whole world need institutions like it."

He explained, too, that the younger royals are eager to continue the legacy of Queen Elizabeth.

Reflecting on the future of the British monarchy, Prince Harry shared: "The monarchy is a force for good and we want to carry on the positive atmosphere that the Queen has achieved for over 60 years, but we won't be trying to fill her boots."