King Charles and Queen Camilla have uploaded a new video on their social media to publicly mark 20 years of marriage together.

The King and Queen married in a civil ceremony at Windsor Guildhall on April 9, 2005, after having known each other since the 1970s.

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 hear emoji].

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.

At their wedding reception, held the same day as the Grand National, Queen Elizabeth II said about their romance: "They have overcome Becher's Brook and The Chair and all kinds of other terrible obstacles. They have come through and I'm very proud and wish them well.

"My son is home and dry with the woman he loves."

The couple's love stood the test of time, with Camilla's devotion to her husband and the monarchy being particularly evident last year, when the monarch was diagnosed with a type of cancer, and she had to step up for him when he took a brief break to focus on his treatment.

Recently, the Queen's sister, Annabel Elliot, made her feelings clear about the couple's relationship.

Speaking to the Mail on Sunday, Ms Elliot, who is an interior designer and antiquities dealer, said: "They have known each other for a long time, almost their entire lives. Theirs, as any marriage should be, is a huge friendship."