It’s King Charles’ big day — but the children of Prince William, 40, and Kate Middleton, 41, didn’t get the memo.

Louis, 5, gave a cute wave to onlookers from his car as he and his family were the last to arrive at Westminster Abbey for the ceremony.

As for George, 9, he was given the special task of being one of his grandfather’s Pages of Honor, having held onto his red robe as the 74-year-old monarch walked into the church.

Elsewhere, Louis and his sister Princess Charlotte, walked in with their parents and held hands as they strolled into the 1,000-year-old church.

Little Louis, soon spotted yawning, was then whisked away by his nanny after entering the Abbey.

George, 9, who will now be second in line for the throne, his sister, Princess Charlotte, 8, and the mischievous Louis are growing up in the spotlight — and have delighted royal watchers with so many endearing moments.

Last summer, during Queen Elizabeth II’s Platinum Jubilee, Louis, then 4, was photographed displaying a full range of emotions, from frustration to defiance.

But when it came to funny faces, an animated Louis was just warming up.

Big sister Charlotte is no slouch when it comes to commanding the cameras, although she is less known for goofy faces and more for waving to the public.

When Charlotte was born, George and his father were photographed in matching blue sweaters, and the proud big brother did the same: waved to photographers.

William and Kate's children steal the show at coronation

ROYAL FAMILY

Their youngest son, Prince

Louis , arrived with them as they made their way to the coronation of King Charles III and Queen Camilla on the morning of May 6.