Breaking: Sir Rod Stewart leaves King Charles in hysterics with playful joke over garden shears….See More

King Charles and Sir Rod Stewart shared a playful moment together as the 80-year-old rocker and his wife Penny Lancaster visited Dumfries House in Scotland.

The monarch, 76 had invited Rod and his 53-year-old wife to the royal residence in Scotland on Wednesday afternoon.

During the reception, which was held to celebrate the 35th anniversary of the King’s Foundation charity (originally set up by Charles as the Prince of Wales’s Institute of Architecture in 1990).

Sir Rod and Penny donned all their finery – including a very plush cable kit jumper and cross-body satchel, to attend the celebration as the newest celebrity ambassadors.

And the 80-year-old Celtic fan, who is set to take the Legends slot at Glastonbury Festival this year, enjoyed a joke with the king during the event.

The couple watched on as King Charles loaded a time capsule to commemorate the date and anniversary of the charity.

One item placed in to the large wooden box was a pair of garden secateurs which were handed over to Charles by an aide.

But before he put them in, the king lightly jabbed them in the singer’s direction. In response, Sir Rod dramatically flinched, stepping back and throwing his arms over his face.

The King, in response, appeared unable to contain his laughter.

Other items placed in the box included a local newspaper, photos, flowers from the Dumfries House garden, and marmalade.

Ahead of the visit, it was revealed that Charles would also be placing a personal letter and the first item into The King’s Foundation’s 35th anniversary time capsule, to mark the start of a year of celebrations.

As part of its work, the foundation promotes the King’s philosophy of harmony which sees everything in nature as interconnected, including ourselves, and advocates taking a holistic approach to the challenges facing the planet.

Over the course of the year, the charity will collect items which people feel represent the achievements and legacy of The King’s Foundation, with a particular focus on what inspired people to devote their time to protecting the built and natural world.

Once the collection of items is complete the time capsule will be buried on the Dumfries House estate and opened in 100 years.

The time capsule itself was designed and made from oak at the Snowdon School of Furniture, part of The King’s Foundation at Highgrove, by King’s Foundation alumnus Aiden Lawley.

Its design has been left intentionally plain to both celebrate the British timber used and to give space for other students and alumni to add decorative elements throughout the year.

A newly created bust of Charles, created by a former King’s Foundation student, Lily Marsh, who now runs a successful sculpting business, will also be on show during the event.

During the visit on Wednesday, the King spoke to members of the local community, ambassadors and alumni of the foundation, while Alan Titchmarsh, an ambassador for the charity, was also in attendance.

And the singer ensured he was adequately wrapped up against the bracing cold for the meeting, donning a Molly-Mae-inspired cream cable knit with a high neck, under a shearling coat.

Meanwhile, his wife Penny opted for a similar warm toned ensemble, pairing a pale brown jumper with a darker skirt of the same colour.

Sir Rod, who has just celebrated his 80th birthday, and model, special constable and Loose Women star Penny have joined the likes of David Beckham and Sienna Miller in the role of celebrity ambassadors.

The veteran rocker, whose hits include Da Ya Think I’m Sexy?, Hot Legs and Maggie May, said: ‘We are so pleased to be coming on board as ambassadors for The King’s Foundation and look forward to lending our support to this worthwhile cause, particularly during such a significant year for the charity.’

Penny, also known as Lady Stewart, said: ‘As a volunteer special constable, the foundation’s approach to building communities – and how access to green spaces can help build better, healthier places – is particularly important to me.