Hamilton’s King George came face to face with his character’s six-times great grandson on Wednesday night.
Prince Harry and Meghan Markle attended a charity performance of the hit musical at the Victoria Palace Theatre in London, delighting the cast.
Harry took to the stage where he burst into song himself with a rendition of You’ll Be Back – sung by the character of his great ancestor King George III in the musical.
Actor Michael Jibson, who plays the king, joked Harry had ‘upstaged him’ with the surprise performance.
Hamilton’s King George came face to face with his character’s six-times great grandson on Wednesday night
Actor Michael Jibson, who plays King George III, joked Harry had ‘upstaged him’ at his own play
Pictured: Family tree showing how Prince Harry and King George III are related
Mr Jibson also revealed that Harry asked him if his crown was heavy, and he admitted that it was indeed heavy.
The show’s award-winning creator, Lin-Manuel Miranda, tweeted: ‘King George III’s great-great-great-great-great-great grandson The Duke Of Sussex sang a few bars tonight.’
Other cast members took to social media to share their excitement at the royals being among the night’s audience.
Rachel John, an Olivier nominated actress, who plays Angelica Schuyler in the musical wrote: ‘Last night was epic…”watch the lady behind Prince Harry” that was me’.
She then shared a video of her jaw-dropping reaction when Prince Harry began to sing.
Actor Leslie Garcia Bowman wrote: ‘A night we will all remember for the rest of our lives.’
Other cast members took to social media to share their excitement at the royals being among the night’s audience members
King George III (pictured), who ruled from 1760 to 1820, is Harry’s six-times great grandfather
The Duke and Duchess of Sussex were introduced to the show’s award-winning creator, Lin-Manuel Miranda, and his wife Vanessa Nadal before the group took their seats in the theatre’s Royal Circle.
The event, which marks the royals’ first public appearance in a month, was held to benefit Prince Harry’s charity Sentebale, which works with children and young people affected by HIV in southern Africa.
Hip hop musical Hamilton tells the story of Alexander Hamilton, one of the Founding Fathers of the United States.
Ironically, the show pokes fun at one of Prince Harry’s distant relatives, King George III, who is cast as a comical and out-of-touch character.
But Harry clearly took it in good spirit. After the show he got on stage and burst into song, mimicking one of the tunes sung by his ancestor, with the words ‘you say’.
The Duke of Sussex after the performance meeting King George, cast and crew backstage at the Victoria Palace Theatre
After the show Meghan and Harry the cast and crew of the hit musical at the London theatre
After the show Harry took to the stage where he began to perform one of the musical’s songs
The audience clapped and cheered at his surprisingly talented antics. But Harry quickly cautioned them not to expect more, saying of the show’s creator: ‘He did try but I said no.’
He thanked the audience for raising hundreds of thousands of pounds for his charity, Sentebale, and to the cast and crew.
He added: ‘I don’t know how you guys do this every single night, over and over again, and in this heat as well.’
Creator Lin-Manuel Miranda also proved a star turn as he told the audience that he came up with idea of putting King George in his show while he was on honeymoon.
‘I wrote the song on my honeymoon and smash, cut to 2018 and I am sitting next to his sixth great-grandson, the Duke of Sussex….’