King Charles and Queen Camilla were described as a pair of "old slippers" by a royal commentator who weighed in on their marriage. The King and Queen are celebrating their 20th wedding anniversary today while they are on tour in Italy.

Charles and Camilla have already publicly marked their 20 years of marriage together with a sweet video posted on their social media. In the video, uploaded on the Royal Family's official social media accounts, the couple can be seen looking loved up during various engagements throughout the years of their relationship. The footage, which also includes a clip of them dancing, was captioned: "20 Happy Years! [white heart emoji].

Now, a royal commentator has painted a rather romantic image of the royal couple's lives together with a seven-word quip of them being "like a comfy old pair of slippers".

Expert Jennie Bond told the Express: "Today, they are like a comfy old pair of slippers: completely content in one other’s company and rather lost when they are apart.

"They are happy to sit together quietly, read their books, or giggle together over a private joke."

Ms Bond added: "Through good times — and recently through bad – Camilla has been the King’s greatest support and cheerleader.

"And he is immensely proud of the way she has taken on so much extra responsibility during his cancer treatment."

The King and Queen married on April 9, 2005 but they had known each other since the 1970s.

Charles first met Camilla on Windsor Great Park polo field in 1970 when he had just left Cambridge University, a year before he joined the Royal Navy.

No marriage proposal came despite the closeness between the pair, and when the relationship cooled after Charles dedicated himself to his Navy career, Camilla wed cavalry officer Andrew Parker Bowles in 1973, and Charles later married Diana, Princess of Wales, in 1981.

After Charles and Camilla both divorced - and Diana died in 1997 - the couple made their relationship official two years later in 1999 and ended up marrying in 2005.