Prince George and Princess Charlotte Get Into the Music at the Coronation Concert

It was a busy weekend for Prince George and Princess Charlotte. The siblings arrived at the king's coronation concert on May 7 to round out the crowning of King Charles III, waving Union Jack flags, dancing, and cheering on the coronation performers, including Lionel Richie and Katy Perry.

For the occasion, Charlotte, 8, wore a white dress with an oversize scalloped collar with her hair braided in a half updo, while George, 9, wore a dapper navy suit and tie. The siblings both bowed diligently to their grandfather as he passed to sit in his seat in a video obtained by Hello. They sat in between their parents, the prince and princess of Wales, the latter of whom wore a red Alexander McQueen trouser suit.

As the concert didn't start until 8 p.m. UK time, their youngest son, 5-year-old Prince Louis, wasn't in attendance — although he did make quite the impression a day earlier at the king's coronation ceremony when he made a number of hilarious facial expressions throughout the service. Their uncle Prince Harry attended the ceremony but headed back to the US a few hours later to celebrate his son Prince Archie's fourth birthday.

On Saturday, King Charles III was formally declared the new British monarch. While Prince George wore a traditional red uniform to perform an important role as second in line to the throne at the service, Princess Charlotte matched her mom in a stunning white Alexander McQueen caped dress and a coordinated Jess Collett x Alexander McQueen headpiece. Keep scrolling to see more adorable photos of Prince George and Princess Charlotte at the coronation concert.