King Charles left comedian Matt Forde in fits of laughter over his joke at the Royal Variety Performance which played off Donald Trump's 'they're eating the cats, they're eating the dogs' comments.
The monarch met the political satirist, who is known for his impressions, following the show, which he had to attend without Queen Camilla by his side.
Mr Forde joked about unfounded claims made by Donald Trump during the recent presidential campaign that illegal immigrants from Haiti were eating locals' pets in the small Ohio city of Springfield.
Imitating Donald Trump, he said: 'They're eating the cats, they're eating the dogs,' before turning to look at the royal box and address the King.
'Your Majesty King Charles, you are named after a spaniel - be very careful, they'll eat you alive.'
The camera spanned to the monarch, who laughed enthusiastically.
Following the show, the monarch was seen meeting Mr Forde who asked: 'Did you mind the joke about sounding like a spaniel?' to which the King replied: 'No, it was a very good joke. You've waited for 300 years to be able to say it!'
The Trump joke stems from a comment the US president-elect made during a debate with Kamala Harris.
The King made a quip that the comedian had been waiting '300 years' to make the joke
Matt Forde burst into laughter at hearing the monarch's response to his question about his joke during his performance at the Royal Variety
King Charles was left in fits of giggles over a comedian's cheeky joke at the Royal Variety Performance
Charles is pictured smiling and waving at the crowd at the Royal Albert Hall
Political satirist Matt Forde, imitating Donald Trump, said: 'They're eating the cats, they're eating the dogs' before turning to look at the royal box and addressing the King
The King laughed at a joke about unfounded claims made by Donald Trump
He said: 'In Springfield, they're eating the dogs.
'The people that came in – they're eating the cats. They're eating the pets of the people that live there. And this is what's happening in our country.'
The debate's moderator, ABC's David Muir, slapped down the ex-president, saying: 'The city manager told us there were no credible reports of pets being harmed... by the immigrant community.'
The local police department later announced that it had 'no credible reports or specific claims of pets being harmed, injured or abused by individuals within the immigrant community'.
The performance saw the red carpet was stolen by television presenter Amanda Holden, who was channelling her inner Little Mermaid - not to mention a set of killer abs.
She sported in a sea-foam coloured cropped, sequin-studded top with boxy shoulder pads and a skirt with a tulle train that bore a startling resemblance to Ariel’s tail.
Holden was there with her show co-host, Alan Carr, whose midnight blue dinner jacket and waistcoat was given added sparkle by a lizard brooch.
They weren’t there to greet the sovereign as they were preparing to go on stage, but planned to meet him afterwards.
However stars including a delighted Sir Elton Joh, were. The monarch, looking smart in a crisp dinner jacket, was spotted laughing as he entered the Royal Albert Hall to be met by Sir Elton.
King Charles laughs as he meets Elton John as he arrives for the Royal Variety Performance
The King met with some of the stars who took to the stage following the show in the Royal Albert Hall
King Charles meets Alan Carr after the Royal Variety Performance
Charles meets Penn Jillette and Teller
King Charles III meets comedian Ellie Taylor at the show
King Charles meets Iris King-Taylor and Louie Cooper, children of Royal Variety supporters
The posy included flowers picked from the gardens of Brinsworth House, the Royal Variety Charity care home in Twickenham, south west London , which mirrored blooms carried by the Queen on her wedding day
During the performance, the monarch accepted a posy meant for his wife from Iris King-Taylor, eight, and Louie Cooper, ten, which included flowers picked from the gardens of Brinsworth House, the Royal Variety Charity care home in Twickenham, south west London, which mirrored blooms carried by the Queen on her wedding day.
Camilla, who had been due to attend, was forced to pull out at the last minute after continuing to suffer from some 'lingering post-viral symptoms' from a nasty chest infection.
A Buckingham Palace spokesperson said: 'Following a recent chest infection, The Queen continues to experience some lingering post-viral symptoms, as a result of which doctors have advised that, after a busy week of engagements, Her Majesty should prioritise sufficient rest.
'With great regret, she has therefore withdrawn from attendance at tonight's Royal Variety Performance. His Majesty will attend as planned.'
It is understood that while she is very much 'on the road to recovery', these things can take time to fully clear.
Given the length and lateness of the engagement, she has, sources said, 'sensibly' decided to heed medical advice not to 'overstretch' herself.
It is understood that she will remain in London until Saturday but then travel to Sandringham for the week as planned.
Insiders insisted there was no cause for alarm, describing it as 'a nasty bug that apparently is going around a bit'.
She is said to be feeling a little under the weather still but, generally speaking. on the mend. A royal source said Her Majesty was 'naturally disappointed to miss the evening's entertainments, and sends her sincere apologies to all those involved, but is a great believer that 'the show must go on'.
'She hopes to be back to full strength and regular public duties very soon,' they added.
King Charles meets Penny Lancaster after the Royal Variety Performance
King Charles greets Nemo after the Royal Variety Performance
A performer meets the king after the Royal Variety Performance
King Charles greets performers after the Royal Variety Performance at the Royal Albert Hall
TV presenter Lorraine Kelly also make made an appearance with her Change and Check Choir led by Wet Wet Wet singer Marti Pellow
King Charles pictured at the Royal Variety Performance at the Royal Albert Hall
The national anthem is played as King Charles III and Giles Cooper, chair of the Royal Variety Charity, attend the Royal Variety Performance
The Royal Variety Show - a hardy annual of the Buckingham Palace calendar - is the world's longest running entertainment show, dating back to 1912.
It supports the Royal Variety Charity which helps members of the entertainment industry in the UK who need help and assistance, including those that have fallen on hard times or need mental health support.
This is the first year that His Majesty has attended as patron of the Royal Variety Charity.
Star turns in this year’s show includes a performances from the new productions of Oliver and The Devil Wears Prada , a song by Sydney Christmas - the winner of this year’s Britain’s Got Talent programme whose prize it is to perform live - plus magic duo Penn & Teller.
Sir Elton and his husband, David Furnish, presented a musical number from their new show, The Devil Wears Prada l, with star Vanessa Williams and its cast.
TV presenter Lorraine Kelly also make made an appearance with her Change and Check Choir led by Wet Wet Wet singer Marti Pellow.
They performed ‘Love Is All Around”, which is being re-released to raise awareness of breast cancer early detection.
The choir is made up of women from across the UK who detected their breast cancer through Kelly's campaign.
The 2024 Royal Variety Performance will be broadcast on TV over the Christmas and New Year holiday.