King George—the British king who bops out crowd-favorite "You'll Be Back," in the Broadway super-hit Hamilton—is actually the sixth great-grandfather of Princes Harry and William.
That made it especially delightful when—after seeing a special West End fundraising performance of the show in London—Prince Harry took center stage and crooned just a couple words in a surprisingly good voice.
That's all the crowd needed to hear to know what was going on. Lin Manuel Miranda, the show's creator who joined the cast and crew on stage, stomped his feet with excitement as the performers laughed delightedly.
"You say..." Thank you to the cast and crew of @HamiltonWestEnd for a fantastic performance, raising awareness and… https://t.co/5DD5PO6ImD— Kensington Palace (@Kensington Palace)1535581045.0
The performance was actually part of a fundraising effort by Prince Harry's charity Sentebale.
According to their website, "Sentebale supports the mental health and wellbeing of children and young people affected by HIV in Lesotho and Botswana. Our programmes of education and care provide the tools and knowledge this vulnerable generation need to live long, happy, healthy lives in future."
The British royal founded the charity in 2006 together with Prince Seeiso of Lesotho after Prince Harry spent a year in Lesotho in 2004. AIDS related and children's charities were an important part of his late mother's—Princess Diana's—life.
In his remarks, the Prince thanked the many donors for taking part:
"Ladies and gentlemen, thank you so much — thank you to Cameron Mackintosh productions, to the show's creators Thomas Kail and of course Lin-Manuel Miranda, the cast and crew."
"And as already mentioned, a round of applause for yourselves for taking part in this evening's activities because you have together, raised a huge amount of money to change the lives of thousands of children in Botswana."
Watch footage of the Duke and Duchess of Sussex—the royal titles conferred on Prince Harry and Meghan Markle by the Queen after their marriage—here:
Prince Harry continued:
"Through the work that we're going to be doing now– we will be able to stop the generational hand down of the stigma around HIV."
HAMILTON AND HARRY: While attending a performance of "Hamilton," Prince Harry, who is King George III's great-great… https://t.co/Et86n4RpiE— CBS News (@CBS News)1535637009.0
The Duke—and his now wife Duchess Meghan—saw the show earlier this year around Valentine's Day as special guests of Miranda.
Miranda himself couldn't get over Prince Harry's familial ties.
Watch him tell the story here:
This has made my year. @Lin_Manuel explaining how much fun it was to sit next to a direct descendant of KG3 while w… https://t.co/t9OHsmSErQ— Matt Nicholls (@Matt Nicholls)1535589069.0
The Twittersphere shared Miranda's delight over both the connection and the Duke of Sussex's joke.
@CNN @gtconway3d That wasn’t bursting into song but that clip nonetheless just made my week.— \W/endy 🤦🏻♀️ (@\W/endy 🤦🏻♀️)1535623911.0
@CBSNews Those 2 words sang by Prince Harry was the best moment on twitter ever.— MomsThoughts™ (@MomsThoughts™)1535639594.0
@RoyalFamilyITNP With a hint of Harry having a good voice, a song release in aid of his charities could raise a lot… https://t.co/4AAZ6Fcolm— Lindsay Wright (@Lindsay Wright)1535614204.0
@CBSNews This guy could be big on The West End, perhaps bigger at Kensington Palace, though.— BoydADavis (@BoydADavis)1535642733.0
There's only one other song that might have garnered a bigger reaction from the Hamilton audience:
@CNN @mattyoungactor Anyway, here’s Wonderwall.— Mr. Sir (@Mr. Sir)1535629376.0
Tickets to Hamilton are extremely hard to get. The Duchess of Sussex may have discovered the best way to get them though, at least in London. Just marry a Prince.