While King Charles III and Queen Camilla may have looked slightly baffled as Miss Piggy and Kermit The Frog took to the stage during the Coronation concert, Princess Charlotte and Prince George couldn't hide their delight.
The iconic characters from The Muppet Show joined host of the Coronation concert, Hugh Bonneville, on stage with Miss Piggy being unable to hide her attraction for the Notting Hill actor.
As she made her moves on the English actor, the cameras panned to Prince George and Princess Charlotte who could be seen giggling and chatting with one another over the bizarre encounter.
Charlotte couldn't hide her smile as Miss Piggy made her advances on Hugh.
Meanwhile, George covered his face as he laughed at the hilarious sketch.
Sadly, the brother and sister were without their youngest sibling Louis who was worn out from all the fun on Saturday.
Louis went viral on social media once again for his hilarious mannerisms and infectious energy.
Tonight, Charlotte and George were treated to an elaborate and star-studded concert at Windsor Castle to celebrate the Coronation, with the likes of Katy Perry, Take That, Lionel Richie and Andrea Bocelli taking to the stage.
The Coronation Choir - a group comprised of the nation's community choirs and amateur singers from across the UK - will also make an appearance alongside The Virtual Choir, which is made up of singers from across the Commonwealth.
Notting Hill star Hugh Bonneville is hosting the concert, and the show will also feature pre-recorded video sketches from Top Gun star Tom Cruise, Dynasty actress Dame Joan Collins, Bear Grylls and Sir Tom Jones, who will recite a number of facts about the monarch.
Preparations for tonight's concert have not been without numerous hiccups along the way.
Not least, a number of major A-Listers turning down the opportunity to perform, be it due to conflicting schedules or their republican stance.
Unfortunately, there have also been a few last minute changes to the schedule due to dropouts over the last few days.
Singer Freya Ridings has been forced to pull out due to sickness, while Zoe Ball announced just hours before the concert began this evening that she would not be taking part.
The Radio 2 DJ said that she was "absolutely gutted" to be unable to attend, saying: "The sickness bug has got me."
