Princess Charlotte assisted her mom, Kate Middleton, in managing her younger brother, Prince Louis, during Trooping the Colour.

Body language expert, Judi James, observed Kate's subtle signals to ensure the children behaved well and stayed enthusiastic.

Kate showed pride when Louis mimicked drumming with the band and guided her children on when to wave.

She used hand gestures to indicate boundaries and rewarded their good behavior with nods and smiles.

Charlotte played a significant role by telling Louis to sit up, and he obeyed immediately.

Kate straightened Louis' tie, and he responded promptly to his sister's instructions.

Charlotte mirrored Kate's actions, signaling Louis to make room when Kate leaned forward to speak to him.

On the balcony, Kate and William worked together, offering encouragement and reward gestures to their children.

During the flypast, Louis turned to his mother with excitement and received a beaming smile and affectionate approval.