Prince Louis of Wales, Princess Charlotte of Wales and Prince George of Wales attend The ‘Together At Christmas’ Carol Service at Westminster Abbey on December 8, 2023 in London, England. Spearheaded by The Princess of Wales, linked to her Shaping Us campaign and supported by The Royal Foundation, the service is a moment to bring people together at Christmas time and recognise those who have gone above and beyond to help others throughout the year

Princess Charlotteis a doting big sister toPrince Louis.

“It’s so sweet seeing the three of them together and particularly Charlotte being super protective of her little brother,” Sophie Mirman, founder of the British childrenswear brandTrotters, tells PEOPLE exclusively, adding that Louis “looked so grown up” in the brand’s “little pea coat and Chelsea boots.”

Prince William, Kate Middleton, Prince George, Princess Charlotte and Prince Louis at Westminster Abbey on December 8, 2023.Chris Jackson/Getty

The Dean of Westminster Abbey, The Very Reverend Dr David Hoyle, Prince William, Prince of Wales, Prince George of Wales, Prince Louis of Wales, Catherine, Princess of Wales and Princess Charlotte of Wales attend The “Together At Christmas” Carol Service at Westminster Abbey on December 08, 2023 in London, England.

Chris Jackson/Getty

These days, Louis loves to copy Charlotte’s every move. In 2021,Prince William revealedthat the family of five loves to play music in the morning and the kids dance around the house. “Charlotte, particularly, is running around the kitchen in her dresses and ballet stuff and everything,” the proud dad said. “She goes completely crazy with Louis following her around trying to do the same thing.”

Charlotte is also known to look after her brother while on royal outings andmakes sure he’s following royal protocol!

All three children were perfectly coordinated in navy and burgundy at Friday’s carol concert, with Charlotte wearing the same red wool coat from the brand that she wore to last year’s service.

“We had no idea that Princess Charlotte was going to be wearing the coat again and she still looks absolutely fantastic in it!” says Mirman.

Prince Louis and Princess Charlotte at the Christmas Carol Concert on December 8, 2023.Chris Jackson/Getty

The Dean of Westminster Abbey, The Very Reverend Dr David Hoyle, Prince William, Prince of Wales, Prince George of Wales, Prince Louis of Wales, Catherine, Princess of Wales and Princess Charlotte of Wales attend The “Together At Christmas” Carol Service at Westminster Abbey on December 08, 2023 in London, England.

In true Louis style, the youngest (and cheekiest!) member of the family couldn’t resist a little festive fun, going to great lengths to blow out his sister’s candle flame as they departed. Charlotte appeared completely unfazed and smiled sweetly at her younger brother.

“Louis is “a cheeky monkey— a typical third child,” someone who knows the family previously told PEOPLE. “It’s nice that the world [gets] to see him enjoying himself.”

On Saturday, William and Katereleased their annual Christmas card, a monochrome image of the family in jeans and white shirts posing in a studio — quite the departure from the usual carefree summer vacation photos that they’ve featured on their cards in years past.

Prince William, Kate Middleton, Prince George, Princess Charlotte and Prince Louis pose for their 2023 Christmas card photo.Josh Shinner/Kensington Palace/PA Wire

Royal Family Christmas

Josh Shinner/Kensington Palace/PA Wire

Of the family’s pared-down black-and-white photo, Mirman says, “I think it’s reflective, there is so much going on in the world — I think possibly there was a nod to that in its simplicity. It wasn’t excessive, it was constrained but in a nice way.”

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With Charlotte the focus of the shot, despite photographer Josh Shinner’s initial sketch suggesting that Louis and Charlotte were going to be seated together on the chair, her confident smile says it all.

Princess Diana’s Christmas card in 1994.Albanpix/Shutterstock

Princess Diana Christmas Card 1994

Albanpix/Shutterstock

Kate Middleton Brings Prince George, Princess Charlotte and Prince Louis to Volunteer at Baby Bank in New Surprise Video

The Prince and Princess of Wales/YouTube

The last time thetrio was seen volunteering was during The Big Help Outon May 8 after the coronation ofKing Charles. While visiting a scout group, a fellow volunteer noted that it was Charlotte taking the lead and helping Louis.

“She was advising him! ‘Don’t do that, Louis!’ — things like that,” Scout volunteer Anne Edwards told PEOPLE at the time, adding that it was sweet to see the Wales kids excited about volunteering.

“They were very relaxed and joining in, like normal kids. That was what was really nice about it,” Edwards said.

source: people.com