Prince Louisis crossing another royal first off the list!

The 4-year-old prince joined parentsKate MiddletonandPrince Williamas well as older siblingsPrince GeorgeandPrincess Charlotteat the royal family’s traditionalEaster church outingon Sunday. Although George, 9, and Charlotte, 7,made their debutat the event in 2022, this year marked Louis' first time publicly joining them on the holiday.

“Boys wear short trousers until they are 8,” Ingrid Seward, editor-in-chief ofMajestymagazine, previously told PEOPLE. “It is very English.”

Prince Louis and Kate Middleton.Mark Cuthbert/UK Press via Getty

WINDSOR, ENGLAND - APRIL 09: Catherine, Princess of Wales and Prince Louis of Wales attend the Easter Mattins Service at St George’s Chapel at Windsor Castle on April 9, 2023 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

Princess Charlottesported afloral dressBritish children’s wear designer Rachel Riley with blue tights. Although she walked to the service wearing a coat, Charlotte ditched her outerwear for the walk back to Windsor Castle — and Kate was seen carrying it as they walked away from St. George’s Chapel.

Just likePrince GeorgeandPrincess Charlotte,Prince Louisshowed off his handshake while greeting the pastor following the church service.

Prince George and Princess Charlotte are quickly becoming pros at traditional royal events. The two eldest Wales kids are now old enough to join the family at many outings, including the annual Christmas walk, amemorial service for their great-grandfather Prince Philipin March 2022 and thefuneral for their great-grandmother Queen Elizabethin September.

Prince George, Prince William, Princess Charlotte, Prince Louis and Kate Middleton.YUI MOK/POOL/AFP via Getty

Britain’s Prince William, Prince of Wales (2L), Britain’s Prince George of Wales (L), Britain’s Catherine, Princess of Wales (R), Britain’s Princess Charlotte of Wales (C) and Britain’s Prince Louis of Wales arrive for the Easter Mattins Service at St. George’s Chapel, Windsor Castle on April 9, 2023. (Photo by Yui Mok / POOL / AFP) (Photo by YUI MOK/POOL/AFP via Getty Images)

Prince Louis' Easter debut came just a few months after hejoined the royals at their Christmas Day church outingfor the first time.

But Prince Louis made a splash when he joined his family at events to celebrateQueen Elizabeth’s Platinum Jubilee, marking her historic 70 years on the throne, in June. All three children of Prince William and Princess Katerode together in their first public horse-drawn carriage ridefor Trooping the Colour, enthusiastically waving to the crowds lining the street before heading up to the Buckingham Palace balcony to watch a flypast.

Samir Hussein/WireImage

WINDSOR, ENGLAND - APRIL 09: Princess Charlotte and Prince Louis attend the Easter Mattins Service at Windsor Castle on April 09, 2023 in Windsor, England. (Photo by Samir Hussein/WireImage)

Prince Louis, who will turn 5 later this month, is around the same age asPrince Williamwhen he marked Easter with the royal family at church for the first time. In 1987 when William was 6, he matched mom Princess Diana in a pale blue coat for the church service.

Yui Mok - WPA Pool/Getty

WINDSOR, ENGLAND - APRIL 09: Prince William, Prince of Wales, Catherine, Princess of Wales with Princess Charlotte, Prince Louis and Prince George (right) after attending the Easter Mattins Service at St George’s Chapel at Windsor Castle on April 9, 2023 in Windsor, England. (Photo by Yui Mok - WPA Pool/Getty Images)

It was announced earlier this week thatPrince George, who is second-in-line to the throne, willserve as one of King Charles' four pagesat the May 6 coronation.

“His parents are very excited and delighted that he is a page,” a spokesperson for the Prince and Princess of Wales tells PEOPLE. “It’s something that his parents have thought long and hard about and are very much looking forward to — and I’m sure George is too.”

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Prince William and Prince Louis.Antony Jones/GC

WINDSOR, ENGLAND - APRIL 09: Prince William, Prince of Wales and Prince Louis attend the Easter Mattins Service at Windsor Castle on April 9, 2023 in Windsor, England. (Photo by Antony Jones/GC Images)

All three ofPrince Williamand Princess Kate’s children are expected to make the journey from Westminster Abbey back to Buckingham Palacein the carriage processionfollowing the coronation.

source: people.com