AceShowbiz - King Charles III and other royal family members absolutely had a great time at the coronation concert. The King, his grandchildren Prince George and Princess Charlotte as well as Duchess of Edinburg Sophie, were spotted dancing along to Lionel Richie's song, "All Night Long".

The "American Idol" judge first kicked things off by performing "Easy (Like Sunday Morning)" at the Sunday, May 7 show. While the musician sit at the piano, the audience sang along as they waved their hands and lit up phones from side to side.

When it came to singing "All Night Long", King Charles, Prince George and Princess Charlotte were seen dancing while waving little union jack flags in excitement. Sophie, in the meantime, was spotted jamming out next to her husband Prince Edward and their 15-year-old son James, Earl of Wessex.

While Prince William and Kate Middleton's two eldest children attended the coronation concert, their youngest son Prince Louis didn't. The 5-year-old, however, stole the show during the Saturday ceremony as he was photographed repeatedly yawning and fidgeting in his seat.

Prince Louis was also pictured staring upwards at the ceiling during the ceremony. At one point, his sister Princess Charlotte, spoke to him, seemingly checking his behavior.

Internet users couldn't help but find Prince Louis' behavior cute. "Louis stealing the show with his yawning I love that kid!" one fan tweeted. "Prince Louis yawning through the whole thing is a real vibe," someone else added, while a third chimed in, "Prince Louis yawning is hilarious, we're all feeling it buddy."