While the newly-crowned King Charles III and Queen Camilla might have seemed slightly puzzled by Miss Piggy and Kermit The Frog's appearance on stage during the Coronation concert, Princess Charlotte and Prince George were over the moon by their arrival.
The iconic characters from The Muppet Show joined host of the event, Hugh Bonneville, on stage and left the young royals in fits of giggles as Miss Piggy flirted with the Notting Hill actor, the Mirror reports.
As she made moves on the English actor, the cameras panned over to Prince George and Princess Charlotte who were laughing and chatting with one another about the strange encounter.
Charlotte was unable to hide her smile as Miss Piggy tried to pursue Hugh as George covered his face as he laughed at the comical sketch.
The brother and sister were without their youngest sibling Louis who was all worn out from the fun on Saturday and once again went for viral online for his hilarious mannerisms and infectious energy.
The two young royals were instead treated to a fantastic star-studded gig at Windsor Castle to celebrate their grandfather's Coronation with the likes of Katy Perry, Lionel Richie and Take That all delivering show-stopping performances.
The Coronation Choir which is made up of the nation's community choirs and amateur singers from around the UK also made an appearance alongside The Virtual Choir which is made up of singers from across the Commonwealth.
The show also featured a pre-recorded video of Top Gun star Tom Cruise flying through the skies as he delivered a message to the King from the cockpit of his own plane.
It's been reported that a number of A-list including Harry Styles and Adele rejected an opportunity to perform in front of the new monarch for reasons that are not known.
A couple of other last minute changes were made to the schedule after singer Freya Riding was forced to pull out due to sickness and Radio 2 DJ Zoe Ball announced just hours before the concert began that she would no longer be able to take part either.
Ball said she was "absolutely gutted" that she couldn't make the historical celebration as she said: "The sickness bug has got me."
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