For Christmas 2023, the family coordinated in blue and green outfits for their second festive appearance as a family of five.
Kate donned a gorgeous blue coat and hat that were complimented beautifully by sapphire earrings, with William and George also donning blue.
A young Princess Charlotte wore a stylish green coat in a similar fashion to her mother's 2022 Christmas Day outfit, whilst Louis brought the family together with green and black tartan pants - adorable!
Prince George and Princess Charlotte first made their Christmas Day debut in 2019, with Prince Louis joining his siblings and parents for the first time in 2022.
The family of five stepped out to celebrate the holidays, attending the "Together At Christmas" Carol Service at Westminster Abbey on December 8th, 2023 in London.
Spearheaded by the Princess of Wales, the annual event is linked to her Shaping Us campaign and was launched to bring together people at Christmas time and recognise those who have gone above and beyond throughout the year.
WATCH NOW: The royal children volunteer at a baby bank alongside their mum, The Princess of Wales. Article continues after video.
The rare public appearance of the family saw both George and Louis don matching navy blue suits like their father Prince William, whilst Charlotte chanelled the holiday spirit in a maroon coatdress with a plus fur-lined collar.
At the service, the children partook in some caroling, candle lighting and even posted their letters to Santa in a red mailbox mixed outside the Abbey.
Prince George was photographed getting a lesson in rugby from his father on October 14th at the Rugby World Cup 2023 quarter-final between Wales and Argentina at the Stade de Marseille in France.
The ten-year-old and his 41-year-old father twinned in matching navy suits with red ties, the pair also making time to meet with both the mayor of Marseille, Benoit Payan, and the President of the Welsh Rugby Union (of which William is also patron) - Gerald Davies.
This is the young prince's second time at an international rugby match after both his parents brought him along to the Guinness Six Nations Rugby match between England and Wales at Twickenham Stadium in London in February 2022.
Prince George and his younger sister Charlotte got well and truly into the sporting spirit with an appearance in the royal box at the men's 2023 Wimbledon final.
Here they are cheering on winner Carlos Alcaraz of Spain after his triumphant victory over Novak Djokovic of Serbia.
And in an adorable moment, Catherine, Princess of Wales twinned with her eight year old daughter as the pair both donned stylish sunglasses, with matching smiles and a love for the great sport of tennis.
WATCH NOW: Prince Louise reacts to loud noises at an air show. Article continues after video.
Prince Louis made another scene-stealing public appearance as he joined his older siblings and parents for a family day out at the Royal International Air Tattoo aka the world's largest annual military air show, at RAF Fairford, Gloucestershire.
In a clip shared by Sky News, the young lad is seen holding his hands over his ears as a large aircraft flies directly overhead.
The children were also spotted on board a military aircraft and were given a tour by army members.
Although, from these images, it doesn't look like Louis or Charlotte were that impressed!
Released by Kensington Palace just hours after Trooping the Colour, this official Father's Day portrait of Prince William and his darling kids is just gorgeous.
All smiles as they look to Dad (and in Prince Louis's case the camera), the portrait also pays homage to the late Queen Elizabeth II, as the bench they are sitting on was a gift to the monarch for her 90th birthday celebrations in 2016.
He may be a prince but Louis is still a cheeky child, pulling faces and having fun at Trooping the Colour in 2023.
Alongside his siblings, he enjoyed a fly past of aircraft by the Royal Air Force during the annual celebrations from the best seat in the house - the balcony of Buckingham Palace!
The 2023 celebrations marked the first time the event was held for King Charles III since his ascension to the throne on May 6th, 2023.
The children departed the historic coronation of their grandfather - King Charles III - in an immaculate carriage that transported them, and their parents, to Buckingham Palace from Westminster Abbey.
As thousands of royal fans gathered on the streets to catch a glimpse of the new monarch and his family, these three played the part perfectly as they waved out the windows and smiled at their adoring fans.
With some support from Mum, all three children took part in an official royal engagement as they represented the monarchy.
The engagement in question saw the children join volunteers who were helping to renovate and improve a scouts hut in Slough, located in the west of London.
On a sunny day in April 2023, the children attended the Easter Mattins Service at St George’s Chapel at Windsor Castle.
They joined fellow members of the royal family including their second and third cousins on their father's side.
The church service is the focal point of the Royal Family’s Easter celebrations and in 2023, was the first to take place without Queen Elizabeth II in attendance.
In 2022, the young royals marked their first Christmas without their beloved great granny, taking part in the royal tradition of a Christmas Day service at Sandringham Church in Norfolk.
Whilst most children would have been busy unwrapping presents from Santa, our Princes, and Princess were dutiful in partaking in the service, something of which Queen Elizabeth II started at the beginning of her long reign.
The trio was all smiles as they skipped off to school on September 7th, 2022.
All three of the royal children currently attend Lambrook School, near Ascot in Bracknell England.
Mum and Dad were surely very proud to see their children pose politely for the cameras as they captured the special milestone.
Currently, the family of five lives in Adelaide Cottage, located in Windsor's Home Park.
Prince George is nearing the end of his primary schooling whilst Prince Louis has just begun.
The Queen's Platinum Jubilee celebrations continued in a day-long pageant on June 5th, 2022 as the country continued to celebrate the monarch's incredible seven decades on the throne.
During the pageant, the children had a front-row seat to numerous marching bands, from across the Commonwealth as well as street theatre, music on the move, urban dance, and the very best of Carnival, May Day, Mela, Fiesta, and Mardi Gras to reflect every decade from the 1950s to the present digital age.
The children couldn't believe their eyes as military planes took part in a flypast of the Buckingham Palace balcony were there standing.
Since the mid-17th century, Trooping the Colour, also known as the monarch's official birthday parade, has seen regiments of the British army perform, which in modern times has seen the inclusion of advanced planes - much to the delight of the children watching (and waving) from below.
The occasion may have been in celebration of their dear great-grandmother - Queen Elizabeth II - who was marking 70 years on the throne, but these young royals stole the show in a Trooping the Colour carriage procession during the Platinum Jubilee festivities.