Over 20 million people tuned in to watch the Coronation Concert air live on television last night and sing along to the likes of Katy Perry, Lionel Richie and Andrea Bocelli.
Take That singers Gary Barlow, Mark Owen and Howard Donald performed together for the special event, for the first time on stage in four years.
The British pop royalty impressed with tracks including Shine and Greatest Day before finishing off with Never Forget - which was especially emotional to viewers.
The choristers of St George's Chapel, Windsor Castle, joined them to give the concert an uplifting finale and encourage guests to get up and clap.
Fans were loving it, with one person sharing on Twitter: "And THAT is why Never Forget will always be in my heart. Nothing can beat that feeling when everyone is doing the arms and singing at the top of their voices."
Just as Howard sang the lyric, 'someday soon this will all be someone else's dream', the camera panned and stayed on the Wales family, who were smiling.
Kate was seen waving the Union Jack flag in the air and looking over at her William, who was clapping and gently smiling, and Charlotte was mimicking the dance.
The moment was especially poignant to William and George - though the nine-year-old seemed unaware - as future monarchs and next in line to the throne.
One viewer tweeted a screenshot of the Waleses with the text: "They chose this shot for 'someday this will all be someone else's dream."
Others noticed the Royals soaking up the moment, with someone saying: "The Waleses enjoying the concert, especially the kids."
Another put: "The Prince & Princess of Wales, Prince George, and Princess Charlotte dancing along to Take That in the #CoronationConcert finale."
It was a star-studded line up for the celebratory gig at Windsor Castle, despite Kylie Minogue, Adele and Harry Styles reportedly turning down the chance to belt out a tune for the newly-crowned King and Queen.
Lionel Richie and more ensured Charles and around 20,000 members of the public still got to enjoy an evening of live music.
Hollywood actor Tom Cruise took to the skies for his cameo at the Coronation Coronation, with the Top Gun star sharing his message for King Charles from the cockpit of his own plane he was flying.
While speaking to camera, Tom told Charles: "Pilot to pilot, Your Majesty, you can be my wingman any time."
William also took to the stage to pay tribute to his newly-crowned dad and tell the unelected head of state how proud his family are of him.
The Prince began his speech this evening with a dad joke, referencing headliner Lionel Richie and promising not to "go on all night long", before sharing an emotional tribute to his own father.
When her dad appeared on stage, eight-year-old Charlotte perked up immediately, looking excited and gesturing to her brother to look, pointing over to the stage.
George, amusingly, didn't look quite as impressed to see his dad up there.
Their mum, Kate, also was 'shining' throughout and fans loved how 'proud' she looked as her husband took to the stage for his speech.
She was spotted laughing at his cheeky joke and beaming at him from the Royal box.
