Built for Queen Victoria, the Grand Staircase at Buckingham Palace has been traversed by Kings and Queens, Princes and Princesses.
But never, one imagines, a twerking pregnant reality star and her radio presenter husband.
Former Made In Chelsea favourites Jamie Laing - who now hosts a show on Radio One - and his wife Sophie Habboo, who are expecting their first baby together, cheekily filmed themselves this afternoon recreating Harry and Meghan's by now infamous 'Baby Mama' dance in the heart of the royal residence.
It is unclear whether it was a dig at the former royals, who sparked huge debate after the Duchess of Sussex posted a jaw-dropping video on Instagram of them doing the viral craze four years ago in the delivery suite shortly before she gave birth to their daughter, Princess Lilibet, earlier this month.
Laing, who posted his video to his own Instagram account with 1.6million followers after attending a glittering reception at the royal residence to celebrate The King's Trust charity, clearly knew he was bending the rules as he wrote: 'They said we couldn't film in Buckingham Palace.'
The clip showed them gyrating on the sweeping red-carpeted and gilded staircase which leads up to the State Rooms, flanked by portraits of members of the Royal Family.
While the moment was most definitely a breach in protocol and could have sparked a royal meltdown, palace aides fortunately found the funny side.
Its official Instagram account 'theroyalfamily' replied to the post saying: 'We see you' accompanied by a pair of eyes and a wink emojis.
The King's Trust entered the conversation in the spirit of the occasion, saying: 'All of our attendees are very well behaved' with the same look and a laughing emoji.
Presenter Fearne Cotton, who was also a guest, added: 'You also had your pap camera out with a flash. Think of what the flash has done to those priceless paintings.'
Another follower posted cheekily: 'When you get to do it at the Palace but Harry and Meghan couldn't lol'.
Another remarked in response to the Royal Family's reaction: 'In a world at times worrying and serious this comment was so needed.'
Proof that no offence was taken, a palace aide told the Mail: 'I'm sure it was done in a spirit of fun, and of course aligned to Jamie's wonderful support for The King's Trust Awards - even if it's not something we would greatly encourage every guest to attempt.'
Referring to 'theroyalfamily' account's official response, they added most definitely with tongue-in-cheek: 'Proof that from time to time the Royal Family account has a sense of humour too.
'As for Jamie, may we recommend a visit to the Tower of London. Hashtag Winkyfacelolz.'
The King's Trust was set up by King Charles when he was Prince of Wales in 1976 to help disadvantaged young people get back into education, work and training.
It has since gone on to help more than one million young people and is considered one of the biggest and most effective charities of its kind in the country.
Laing, who is a supporter of its work, attended a reception at Buckingham Palace yesterday alongside the likes of George and Amal Clooney to highlight its annual awards for some of the charity's greatest success stories.
