At just three years old Princess Charlotte is already known for stealing the show with her adorable royal wave and confident nature. Stepping out for her little brother Prince Louis' christening on Monday, the youngster was in her best form as she went about her royal duties.
In her signature look, a Little Alice London blue floral sun dress with puffed sleeves, the princess arrived at The Chapel Royal at St James's Palace in London where she dutifully greeted the Arch Bishop of Canterbury with a polite handshake. Prince William said "Well done!" to his two older children as they behaved beautifully.
Charlotte also gave a royal wave to the photographers waiting outside, while George appeared a little shy.
But upon passing by the photographers a second time, Charlotte reminded the media they were not invited to the private family event that followed.
Leaving the chapel and walking alongside her father with the ceremony booklet firmly under her arm, Charlotte told photographers, "You're not coming."
She followed her statement up with a purposeful stare, making sure they understood she meant business.
Charlotte's stern remark put a smile on her mum's face. Catherine, Duchess of Cambridge, 36, then responded, "How come?"
WATCH: "You're not coming!" Princess Charlotte warns photographers...
As Prince William, 36, has previously revealed, the little royal already has her own ideas about style and fashion. For the family affair, Charlotte debuted a brand new hairstyle. Clearly blessed with her mother's glossy locks, Charlotte's bob was parted in the centre under a sweet blue headband.
Usually the Cambridge's middle child wears her hair parted on the side or pulled back into a half-up style, like she did for her recent polo outing and for uncle Prince Harry's royal wedding.
Charlotte's older brother Prince George showed his more reserved side at the occasion, keeping close to his dad's side.
The special occasion marked the first time the family of five have been photographed together. Duchess Catherine cradled the sleeping 11-week-old Louis as the family arrived for the baptism.
The sleeping Prince looked peaceful and unaware of all the fuss carrying on around him. Kate was overheard calling her third child "very relaxed and peaceful," before confessing: "I hope he stays like this!"
The Duchess couldn't have looked more in love with her darling baby boy.
Prince Louis' christening was also attended by his uncle and aunt, Prince Harry and Meghan Markle, proud grandfather Prince Charles and his wife Duchess Camilla, as well as Kate's family, Carole Middleton, Michael Middleton, James Middleton and a pregnant Pippa Middleton.
Unfortunately, Prince Louis' great-grandparents Queen Elizabeth, 92, and Prince Philip, 96, did not attend. It's believed the decision was made not because of health reasons but due to The Queen's hectic upcoming schedule.